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Sökning: WFRF:(Sparén Pär)

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1.
  • Akre, O, et al. (författare)
  • Body size and testicular cancer
  • 2000
  • Ingår i: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 0027-8874 .- 1460-2105. ; 92:13, s. 1093-1096
  • Tidskriftsartikel (refereegranskat)
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2.
  • Alfonzo, Emilia, et al. (författare)
  • Risk of vaginal cancer among hysterectomised women with cervical intraepithelial neoplasia: a population-based national cohort study.
  • 2020
  • Ingår i: BJOG : an international journal of obstetrics and gynaecology. - : Wiley. - 1471-0528 .- 1470-0328. ; 127:4, s. 448-454
  • Tidskriftsartikel (refereegranskat)abstract
    • To study the risk of vaginal cancer among hysterectomised women with and without CIN.Population-based national cohort study.All Swedish women, five million in total, aged 20 and up, 1987-2011 using national registries.The study cohort was subdivided into four exposure groups: hysterectomised with no previous history of CIN3 and without prevalent CIN at hysterectomy; hysterectomised with a history of CIN3/adenocarcinoma in situ (AIS); hysterectomised with prevalent CIN at hysterectomy; non-hysterectomised.Vaginal cancer.We identified 898 incident cases of vaginal cancer.Women with prevalent CIN at hysterectomy and those with CIN3/AIS history had incidence rates (IR) of vaginal cancer: 51.3 (34.3-76.5) and 17.1 (12.5-23-4) per 100000, respectively. Age-adjusted IR-ratios (IRRs) compared to hysterectomised with benign cervical history, were 21.0 (13.4-32.9) and 5.81(4.00-8.43), respectively. IR for non-hysterectomised women was 0.87 (0.81-0.93) and IRR 0.37 (0.30-0.46). In hysterectomised with prevalent CIN, the IR remained high after 15 years of follow-up: 65.7 (21.2-203.6).Our findings suggest that hysterectomised women with prevalent CIN at surgery should be offered surveillance. Hysterectomised women without the studied risk factors have a more than doubled risk of contracting vaginal cancer compared with non-hysterectomised women in the general population. Still, the incidence rate does not justify screening.
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3.
  • Andrae, Bengt, et al. (författare)
  • Screening and cervical cancer cure: population based cohort study.
  • 2012
  • Ingår i: BMJ (Clinical research ed.). - : BMJ. - 1756-1833 .- 0959-8138 .- 1468-5833. ; 344
  • Tidskriftsartikel (refereegranskat)abstract
    • To determine whether detection of invasive cervical cancer by screening results in better prognosis or merely increases the lead time until death.
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4.
  • Andrae, Bengt, et al. (författare)
  • Screening-preventable cervical cancer risks : evidence from a nationwide audit in Sweden.
  • 2008
  • Ingår i: J Natl Cancer Inst. - : Oxford University Press (OUP). - 1460-2105 .- 0027-8874. ; 100:9, s. 622-9
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The effectiveness of cervical cancer screening programs differs widely in different populations. The reasons for these differences are unclear. Routine and comprehensive audits have been proposed as an ethically required component of screening. We performed a nationwide audit of the effectiveness of the Swedish cervical cancer screening program.Methods: We identified all invasive cervical cancer cases that were diagnosed in Sweden from January 1, 1999, through December 31, 2001, and had been reported to the Swedish Cancer Registry (n = 1230 cases). We verified the diagnoses by histopathologic rereview and matched each case subject to five (population-based) age-matched control subjects who were identified from the National Population Register. The Pap smear screening histories for case and control subjects were reviewed for a 6-year period using the National Cervical Cancer Screening Register, which contains data on essentially all relevant cytological and histological diagnoses in Sweden. Odds ratios (ORs), and their 95% confidence intervals (CIs), of cervical cancer according to screening history were calculated in conditional logistic regression models. All statistical tests were two-sided.Results: Women who had not had a Pap smear within the recommended screening interval had higher risk of cervical cancer than women who had been screened (OR = 2.52, 95% CI = 2.19 to 2.91). This risk was similarly increased for all age groups (Phomogeneity = .96). The risk for nonsquamous cell cervical cancers (OR = 1.59, 95% CI = 1.20 to 2.11) was also increased. Women who had not had a Pap smear within the recommended screening interval had a particularly high risk of advanced cancers (OR = 4.82, 95% CI = 3.61 to 6.44). Among women who had been screened within the recommended interval, those with abnormal Pap smears had a higher risk of cervical cancer than those with normal smears (OR = 7.55, 95% CI = 5.88 to 9.69) and constituted 11.5% of all women with cervical cancer.Conclusions: Nonadherence to screening intervals was the major reason for cervical cancer morbidity. The screening program was equally effective for women of all ages and was also effective against nonsquamous cancers.
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5.
  • Azerkan, Fatima, et al. (författare)
  • Cervical screening participation and risk among Swedish-born and immigrant women in Sweden
  • 2012
  • Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136 .- 1097-0215. ; 130:4, s. 937-947
  • Tidskriftsartikel (refereegranskat)abstract
    • Cervical cancer is one of the most common cancers among women worldwide, although cervical screening has reduced the incidence in many high-income countries. Low screening uptake among immigrant women may reflect differences in risk of cervical cancer. We investigated the degree of participation in cervical screening among immigrant and Swedish-born women and their concurrent risk of cervical cancer based on individual information on Pap smears taken both from organized and opportunistic screening. Mean degree of participation in cervical screening was estimated for women between 23 and 60 years from 1993 to 2005, stratified by birth region and age at migration. In Poisson regression models, we estimated relative risks (RRs), incidence rates and incidence rate ratios of cervical cancer for women adhering or not to the cervical screening program. We also assessed effect of adherence to screening on the risk of cervical cancer among immigrant groups compared to Swedish-born women. The degree of participation was 62% and 49% among Swedish-born and immigrant women, respectively, with large variations between immigrant groups. Participation was lowest among those immigrating at older ages. Swedish-born and immigrant women who where nonadherent to the cervical screening program had a fivefold excess risk of cervical cancer compared to adherent women. After adjustment for screening adherence, excess RRs of cervical cancer were statistically significant only for women from Norway and the Baltic States. Participation to screening is lower among immigrant than Swedish-born women, and adherence to the recommended screening intervals strongly prevents cervical cancer.
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8.
  • Berggrund, Malin, 1989- (författare)
  • Identification and clinical implementation of biomarkers for cervical cancer
  • 2020
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Introduction of organised screening programs and prophylactic vaccination against human papilloma virus (HPV) have successfully reduced the incidence of cervical cancer globally. In Sweden, the incidence has been reduced by about 50 % since the introduction of the national screening programme in the late 1960’s. Despite these efforts, cervical cancer is still a major cause of cancer deaths globally.In order to reduce cervical cancer, the screening program should have a high participation rate and be based on a sensitive and specific screening test. About 20 % of women in Sweden do not participate in the organised screening program, and during the last years we have also seen a rise in cervical cancer cases in Sweden among women who participate in the screening program. Thus, there is a need to develop improved screening strategies that result in a higher participation rate, and are based on tests that more precisely identify women with high risk of developing cervical cancer. This includes searching for novel biological markers (biomarkers) that can be used to more accurately identify women with a high risk of developing cervical cancer.By offering women self-sampling for HPV analysis through direct mailing of sample kits with a chemically treated paper card, the FTA card, we were able to increase the participation rate in the screening program. We also found that the use of repeated self-sampling for women that were HPV positive in the primary screening sample increased the number of women detected with higher risk of cervical cancer (Paper II). Self-sampling was shown to be non-inferior to assisted sampling by midwife (Paper III). Using this sample collection device, we further investigated the association between increased risk of cervical cancer and HPV viral load (Paper V) as well as the vaginal microbiota (Paper VI). We also showed that proteins in the vaginal fluid can be studied using self-sampling and the FTA card (Paper I). Lastly, we identified plasma proteins that are associated with cervical cancer and could represent future biomarkers (Paper IV).This thesis has provided novel aspects on the present screening strategy, explored opportunities to increase the participation rate as well as examined possible future biomarkers for screening of cervical cancer.
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9.
  • Bergström, R., et al. (författare)
  • Trends in cancer of the cervix uteri in Sweden following cytological screening
  • 1999
  • Ingår i: British Journal of Cancer. - : Springer Science and Business Media LLC. - 0007-0920 .- 1532-1827. ; 81:1, s. 159-166
  • Tidskriftsartikel (refereegranskat)abstract
    • Trends in cervical cancer incidence following the introduction of screening have mostly been studied using cross-sectional data and not analysed separately for squamous cell cancer and adenocarcinomas. Using Swedish nationwide data on incidence and mortality, we analysed trends during more than 3 decades and fitted Poisson-based age-period-cohort models, and also investigated whether screening has reduced the incidence of adenocarcinomas of the cervix. The incidence of reported cancer in situ increased rapidly during 1958-1967. Incidence rates of squamous cell cancer, fairly stable before 1968, decreased thereafter by 4-6% yearly in women aged 40-64, with a much smaller magnitude in younger and older women. An age-cohort model indicated a stable 70-75% reduction in incidence for women born 1940 and later compared with those born around 1923. The incidence of adenocarcinomas doubled during the 35-year study period. The mortality rate increased by 3.6% before 1968 and decreased by 4.0% yearly thereafter. Although a combination of organized and opportunistic screening can reduce the incidence of squamous cell cancer substantially, the incidence of adenocarcinomas appears uninfluenced by screening.
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10.
  • Buchmayer, Susanne, et al. (författare)
  • Can Association Between Preterm Birth and Autism be Explained by Maternal or Neonatal Morbidity?
  • 2009
  • Ingår i: Pediatrics. - : American Academy of Pediatrics (AAP). - 0031-4005 .- 1098-4275. ; 124:5, s. E817-E825
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: We examined whether an association between preterm birth and risk of autistic disorders could be explained by pregnancy complications or neonatal morbidity. METHODS: This Swedish, population-based, case-control study included 1216 case subjects with autistic disorders who were born between 1987 and 2002 and 6080 control subjects who were matched with respect to gender, birth year, and birth hospital. We assessed associations between gestational age and autistic disorders and adjusted for maternal, birth, and neonatal characteristics. Conditional logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals (CIs). RESULTS: Compared with infants born at term, the unadjusted ORs for autistic disorders among very and moderately preterm infants were 2.05 [95% CI: 1.26-3.34] and 1.55 [95% CI: 1.22-1.96], respectively. When we controlled for maternal, pregnancy, and birth characteristics, ORs were reduced to 1.48 [95% CI: 0.77-2.84] and 1.33 [95% CI: 0.98-1.81], respectively. When we also controlled for neonatal complications, ORs were 0.98 [95% CI: 0.45-2.16] and 1.25 [95% CI: 0.90-1.75], respectively. Reductions in risks of autistic disorders related to preterm birth were primarily attributable to preeclampsia, small-for-gestational age birth, congenital malformations, low Apgar scores at 5 minutes, and intracranial bleeding, cerebral edema, or seizures in the neonatal period. Neonatal hypoglycemia, respiratory distress, and neonatal jaundice were associated with increased risk of autistic disorders for term but not preterm infants. CONCLUSION: The increased risk of autistic disorders related to preterm birth is mediated primarily by prenatal and neonatal complications that occur more commonly among preterm infants.
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11.
  • Carlander, Christina, et al. (författare)
  • Employment by HIV status, mode of HIV transmission and migrant status : a nation-wide population-based study
  • 2021
  • Ingår i: AIDS. - : Wolters Kluwer. - 0269-9370 .- 1473-5571. ; 35:1, s. 115-123
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To compare employment in people by HIV status, mode of HIV transmission and migrant status.Design: Nation-wide population-based register data from 1996 to 2016.Methods: All people born between 1940 and 2000 (n = 8587 629) were identified from the Swedish Total Population Register and linked to the Swedish National HIV Register (n = 9492) and Longitudinal Integration Database for Health Insurance and Labour Market Studies. Adjusted prevalence ratios (adjPR) of employment were calculated using Poisson regression. Trends in employment were illustrated in scatterplots with overlaid prediction plots.Results: People with HIV were less likely employed than HIV-negative but with decreasing difference over time [adjPR 0.57, 95% confidence interval (CI) 0.54–0.60 in 1996, adjPR 0.84, 95% CI 0.83–0.86 in 2016]. Female migrants with HIV had the highest increase of employment over time and were more likely employed than HIV-negative female migrants by end of follow-up (adjPR 1.12, 95% CI 1.08–1.16). Swedish-born with present/former intravenous drug use had the lowest employment rates. Individuals with undetectable HIV-RNA viral levels showed higher employment rates (adjPR 1.29, 95% CI 1.20–1.38) compared with those with detectable viral levels.Conclusion: Employment in people living with HIV (PLWH) increased over time but remained lower than for HIV-negative people. HIV was not associated with lower employment in migrants by end of follow-up, indicating that HIV is not a barrier for employment among migrants in Sweden. The heterogeneity of PLWH needs to be taken into account in interventions, and future studies, focusing on access to the labour market in PLWH.
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12.
  • Carlander, Christina, et al. (författare)
  • HPV Types in Cervical Precancer by HIV Status and Birth Region : A Population-Based Register Study
  • 2020
  • Ingår i: Cancer Epidemiology, Biomarkers and Prevention. - : AMER ASSOC CANCER RESEARCH. - 1055-9965 .- 1538-7755. ; 29:12, s. 2662-2668
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Data are lacking regarding which human papillomavirus (HPV) types cause high-grade cervical neoplasia (CIN2+) in people with HIV in Europe. We assessed which HPV types are associated with CIN2+ in women living in Sweden by HIV status.Methods: The Swedish National HIV Registry, the Swedish Population Registry, and the Swedish National Cervical Screening Registry were linked. CIN2+ tissue blocks of 130 women living with HIV (WLWH) and 234 HIV-negative women, matched for country of birth (1:2), were retrieved from bio-banks and HPV genotyped. Adjusted ORs (adjOR), stratified by country of birth, were calculated using conditional logistic regression. Matching was broken for cross-group comparisons.Results: WLWH with CIN2 were less likely to have HPV16 [14% vs. 40%; adjOR 0.1; 95% confidence interval (CI), 0.04-0.56] than HIV-negative women, but among women with CIN3, there was no difference in HPV16 prevalence by HIV status (adjOR 0.9; 95% CI, 0.51-1.70). WLWH were six times more likely to have HPV35 in CIN3 than HIV-negative women (adjOR 6.2; 95% CI, 1.3-30.4). WLWH from sub-Saharan Africa (SSA) had less 9-valent vaccine types, compared with both HIV-negative women born in Sweden (adjOR 0.1; 95% CI, 0.02-0.44) and WLWH born in Sweden (adjOR 0.1; 95% CI, 0.01-0.73), mostly because of decreased HPV16 and increased HPV35.Conclusions: WLWH from SSA were less likely to be covered by the 9-valent vaccine, mostly due to less HPV16 and more HPV35. Impact: This could have implications for HPV vaccines, currently not including HPV35, and for HPV-screening algorithms in women with origin from SSA.
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13.
  • Carlander, Christina, et al. (författare)
  • Nonvaccine human papillomavirus genotype common in women with HIV failing cervical precancer treatment
  • 2021
  • Ingår i: AIDS. - : Wolters Kluwer. - 0269-9370 .- 1473-5571. ; 35:14, s. 2367-2374
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: The aim of this study was to assess failure after treatment of high-grade cervical intraepithelial neoplasia (CIN2+) by HIV status and human papillomavirus (HPV) type.Design: A population-based register study.Methods: The Swedish National HIV Registry, the Swedish Population Registry and the Swedish National Cervical Screening Registry were linked to identify all women in Stockholm and Gothenburg counties (Sweden) living with HIV and diagnosed with CIN2+ sometime between 1983 and 2014 (n = 179). HIV-negative controls with CIN2+, were matched (2 : 1) for country of birth. CIN2+ biopsies were retrieved from biobanks and genotyped. Absolute risk and adjusted odds ratios (adjOR) of treatment failure by HIV status given HPV type (HPV16/18 vs. non-HPV16/18) were calculated.Results: HPV16 (32%) and HPV35 (24%) dominated in women living with HIV (WLWH) with failure, HPV35 mainly in women born in sub-Saharan Africa (67%). The absolute risk of failure in women with HPV16/18 was 26% [95% confidence interval (95% CI) 14-44] in WLWH and 12% in HIV-negative (95% CI 7-19). The absolute risk of failure in women with non-HPV16/18 was 20% (95% CI 12-31) in WLWH and 5% in HIV-negative (95% CI 2-11). WLWH with non-HPV16/18 were six times more likely to fail than HIV-negative (adjOR 6.1, 95% CI 2.0-18.6).Conclusion: HPV35, not included in current HPV vaccines, was the second most common type in WLWH with failure. WLWH with non-HPV16/18 were six times more likely to fail than HIV-negative. This could have implications for surveillance and vaccination post CIN2+ treatment, particularly in WLWH from sub-Saharan Africa.
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14.
  • Carlander, Christina, et al. (författare)
  • Suppressive antiretroviral therapy associates with effective treatment of high-grade cervical intraepithelial neoplasia
  • 2018
  • Ingår i: AIDS. - : LIPPINCOTT WILLIAMS & WILKINS. - 0269-9370 .- 1473-5571. ; 32:11, s. 1475-1484
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: To assess if women living with HIV (WLWH) have poorer outcome after treatment of cervical intraepithelial neoplasia grade 2, grade 3, adenocarcinoma in situ or cervical cancer (CIN2+) than HIV-negative women (HNW) and to identify predictors of CIN2+ treatment failure and recurrence in WLWH. Design: Population-based cohort study with follow-up between 1983 and 2015. Methods: The Swedish National HIV Registry, the Swedish Population Registry and the Swedish National Cervical Screening Registry were linked to identify all women in Stockholm and Gothenburg counties (Sweden) living with HIV and diagnosed with CIN2+ (n = 179) sometime between 1983 and 2014. For each WLWH, two HNW resident in the same counties and matched for country of birth, diagnosed with CIN2+, were chosen as controls. Treatment failure was defined as the presence of CIN2+ at initial follow-up. Recurrence was defined as the presence of CIN1+ subsequent to an initial normal follow-up. Results: WLWH were three times more likely to have treatment failure (odds ratio (OR) 3.7 [95% confidence interval (CI) 2.0-6.8]) and five times more likely to recur (hazard ratio 5.0 [95% CI 2.1-11.6]) than HNW. Suppressive antiretroviral therapy (ART) at time of treatment of CIN2+ was associated with reduced OR of treatment failure (OR 0.3 [95% CI 0.1-0.8]). Immunosuppression (CD4(+) cell count < 200 cells/mu l) associated strongly with treatment failure (OR compared with CD4 (+) cell count >= 500: 8.5 [95% CI 2.3-30.7]). Conclusion: Suppressive ART is associated with effective treatment of CIN2+. Early HIV diagnosis and ART are essential for successful CIN2+ treatment.
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15.
  • Dahlström, Lisen Arnheim, et al. (författare)
  • Prospective study of human papillomavirus and risk of cervical adenocarcinoma.
  • 2010
  • Ingår i: International journal of cancer. Journal international du cancer. - : Wiley. - 1097-0215 .- 0020-7136. ; 127:8, s. 1923-30
  • Tidskriftsartikel (refereegranskat)abstract
    • Human papillomaviruses (HPV) are established as a major cause of cervical carcinoma. However, causality inference is dependent on prospective evidence showing that exposure predicts risk for future disease. Such evidence is available for squamous cell carcinoma, but not for cervical adenocarcinoma. We followed a population-based cohort of 994,120 women who participated in cytological screening in Sweden for a median of 6.7 years. Baseline smears from women who developed adenocarcinoma during follow-up (118 women with in situ disease and 164 with invasive disease) and their individually matched controls (1,434 smears) were analyzed for HPV using PCR. Conditional logistic regression was used to estimate odds ratios (OR) of future adenocarcinoma with 95% confidence intervals (CI). Being positive for HPV 16 in the first cytologically normal smear was associated with increased risks for both future adenocarcinoma in situ (OR: 11.0, 95% CI: 2.6-46.8) and invasive adenocarcinoma (OR: 16.0, 95% CI: 3.8-66.7), compared to being negative for HPV 16. Similarly, an HPV 18 positive smear was associated with increased risks for adenocarcinoma in situ (OR: 26.0, 95% CI: 3.5-192) and invasive adenocarcinoma (OR: 28.0, 95% CI: 3.8-206), compared to an HPV 18 negative smear. Being positive for HPV 16/18 in 2 subsequent smears was associated with an infinite risk of both in situ and invasive adenocarcinoma. In conclusion, infections with HPV 16 and 18 are detectable up to at least 14 years before diagnosis of cervical adenocarcinoma. Our data provide prospective evidence that the association of HPV 16/18 with cervical adenocarcinoma is strong and causal.
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16.
  • Fall, Katja, 1971-, et al. (författare)
  • Immediate risk for cardiovascular events and suicide following a prostate cancer diagnosis : prospective cohort study
  • 2009
  • Ingår i: PLoS Medicine. - San Francisco, Calif. : Public Library of Science. - 1549-1277 .- 1549-1676. ; 6:12, s. e1000197-
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Stressful life events have been shown to be associated with altered risk of various health consequences. The aim of the present study was to investigate whether the emotional stress evoked by a prostate cancer diagnosis increases the immediate risks of cardiovascular events and suicide.METHODS AND FINDINGS: We conducted a prospective cohort study by following all men in Sweden who were 30 y or older (n = 4,305,358) for a diagnosis of prostate cancer (n = 168,584) and their subsequent occurrence of cardiovascular events and suicide between January 1, 1961 and December 31, 2004. We used Poisson regression models to calculate relative risks (RRs) and 95% confidence intervals (CIs) of cardiovascular events and suicide among men who had prostate cancer diagnosed within 1 y to men without any cancer diagnosis. The risks of cardiovascular events and suicide were elevated during the first year after prostate cancer diagnosis, particularly during the first week. Before 1987, the RR of fatal cardiovascular events was 11.2 (95% CI 10.4-12.1) during the first week and 1.9 (95% CI 1.9-2.0) during the first year after diagnosis. From 1987, the RR for cardiovascular events, nonfatal and fatal combined, was 2.8 (95% CI 2.5-3.2) during the first week and 1.3 (95% CI 1.3-1.3) during the first year after diagnosis. While the RR of cardiovascular events declined, the RR of suicide was stable over the entire study period: 8.4 (95% CI 1.9-22.7) during the first week and 2.6 (95% CI 2.1-3.0) during the first year after diagnosis. Men 54 y or younger at cancer diagnosis demonstrated the highest RRs of both cardiovascular events and suicide. A limitation of the present study is the lack of tumor stage data, which precluded possibilities of investigating the potential impact of the disease severity on the relationship between a recent diagnosis of prostate cancer and the risks of cardiovascular events and suicide. In addition, we cannot exclude residual confounding as a possible explanation.CONCLUSIONS: Men newly diagnosed with prostate cancer are at increased risks for cardiovascular events and suicide. Future studies with detailed disease characteristic data are warranted.
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17.
  • Fang, Fang, et al. (författare)
  • Amyotrophic lateral sclerosis in Sweden, 1991-2005
  • 2009
  • Ingår i: Archives of Neurology. - Chicago, USA : American Medical Association. - 0003-9942 .- 1538-3687. ; 66:4, s. 515-9
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives: To investigate the temporal trend of amyotrophic lateral sclerosis (ALS) incidence in Sweden between January 1, 1991, and December 31, 2005, and to explore incidence variations according to major demographic factors.Design: Population-based study.Setting: Academic research.Participants: All incident cases of ALS identified through the Swedish Inpatient Register between January 1, 1991, and December 31, 2005.Main outcome measure: Age-standardized incidence rates were calculated by applying the observed age-specific incidence rates to the age distribution of the Swedish population in 1991. A linear regression model was used to assess the potential trend of the incidence during calendar years. We also followed up the entire population registered in the 1990 Population and Housing Census for incidence of ALS. Relative risk and 95% confidence interval of ALS associated with demographic variables were estimated using Poisson regression models.Results: The age-standardized incidence rates increased from 2.32 per 100,000 person-years in 1991-1993 to 2.98 per 100,000 person-years in 2003-2005, representing an annual increase of approximately 2% during the 15 years (P value for trend, .002). The age-specific incidence rates increased in all age groups except those younger than 50 years. The observed increase remained significant when restricting the analysis to individuals born in Sweden (P value for trend, <.001). Compared with individuals born from April through June, those born from October through December were at 11% increased risk of ALS (95% confidence interval, 1.01-1.23).Conclusions: The incidence of ALS has been increasing during the last 15 years in Sweden. Further studies are warranted to explore the underlying reasons for this observed trend.
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18.
  • Fang, Fang, et al. (författare)
  • Loss of a child and the risk of amyotrophic lateral sclerosis
  • 2008
  • Ingår i: American Journal of Epidemiology. - Cary, USA : Oxford University Press. - 0002-9262 .- 1476-6256. ; 167:2, s. 203-10
  • Tidskriftsartikel (refereegranskat)abstract
    • Between 1987 and 2005, the authors conducted a case-control study nested within the entire Swedish population to investigate whether loss of a child due to death is associated with the risk of amyotrophic lateral sclerosis (ALS). The study comprised 2,694 incident ALS cases and five controls per case individually matched by year of birth, gender, and parity. Odds ratios and their corresponding 95% confidence intervals for ALS were estimated by using conditional logistic regression models. Compared with that for parents who never lost a child, the overall odds ratio of ALS for bereaved parents was 0.7 (95% confidence interval (CI): 0.6, 0.8) and decreased to 0.4 (95% CI: 0.2, 0.8) 11-15 years after the loss. The risk reduction was also modified by parental age at the time of loss, with the lowest odds ratio of 0.4 (95% CI: 0.2, 0.9) for parents older than age 75 years. Loss of a child due to malignancy appeared to confer a lower risk of ALS (odds ratio = 0.5, 95% CI: 0.3, 0.8) than loss due to other causes. These data indicate that the risk of developing ALS decreases following the severe stress of parental bereavement. Further studies are needed to explore potential underlying mechanisms.
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19.
  • Fang, Fang, et al. (författare)
  • Risk of infection-related cancers after the loss of a child : a follow-up study in Sweden
  • 2011
  • Ingår i: Cancer Research. - Philadelphia, USA : American Association for Cancer Research. - 0008-5472 .- 1538-7445. ; 71:1, s. 116-22
  • Tidskriftsartikel (refereegranskat)abstract
    • It is unknown whether severe emotional stress due to loss of a child influences the risk of cancers susceptible to immune modulation such as infection-related cancers. We conducted a historic cohort study in 1990 to 2004 on the basis of the Swedish Multi-Generation Register including 4,687,073 parents. Death of a child was identified through the Causes of Death Register. Poisson regression was used to derive the relative risks (RR) and 95% confidence intervals (CI) of infection-related cancers, comparing the incidence rates of parents who lost a child with those who never lost a child. A total of 101,306 parents (2%) had lost a child during follow-up, among whom 1,608 subsequently developed infection-related cancers. After adjustment for age, sex, calendar year, educational level, and civil status, the overall RR of 14 cancers studied was 1.07 (95% CI: 1.02-1.12). Parents who lost a child were particularly at a higher risk for cancers potentially associated with human papilloma virus (HPV) infection such as cervical cancer (RR: 1.46; 95% CI: 1.17-1.80). Higher RRs for most cancers were obtained within 5 years after child loss and excess risk for liver and stomach cancers was confined to that period. No association was observed for lymphoma and nonmelanoma skin cancer at any time point after child loss. Although potential confounding by unmeasured factors cannot be ruled out, our findings lend support to the hypothesis that severe life stressors, such as child loss, may raise the risk for several, chiefly HPV-related, cancers.
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20.
  • Harlow, Bernard L, et al. (författare)
  • Incidence of hospitalization for postpartum psychotic and bipolar episodes in women with and without prior pregnancy or prenatal psychiatric hospitalizations
  • 2007
  • Ingår i: Archives of General Psychiatry. - : American Medical Association (AMA). - 0003-990X .- 1538-3636. ; 64:1, s. 42-48
  • Tidskriftsartikel (refereegranskat)abstract
    • CONTEXT: Postpartum psychosis occurs in 1 to 2 cases per 1000 live births. Most studies have not distinguished postpartum psychosis from bipolar disorder or the proportion of the incidence attributable to prepregnancy psychiatric morbidity. OBJECTIVE: To determine the incidence of postpartum psychosis and bipolar disorder attributable to previous psychiatric hospitalization. DESIGN: Population-based study using linked registry data to determine postpartum onset of psychotic and bipolar episodes within 90 days after the first birth, by women with and without prepregnancy or prenatal psychiatric hospitalization. We assessed the type, number, and recency of previous hospitalizations on the incidence of hospitalization for postpartum psychotic and bipolar episodes. SETTING: Nationwide Swedish Hospital Discharge and Medical Birth registers. PATIENTS: Swedish women delivering a first live infant between January 1, 1987, and December 31, 2001. MAIN OUTCOME MEASURES: Postpartum hospitalization for psychosis or bipolar disorder. RESULTS: The cumulative incidences for postpartum psychotic and bipolar episodes (adjusted for age at first birth) were 0.07% and 0.03%, respectively. The incidence of psychiatric hospitalizations for postpartum psychotic or bipolar episodes among women without previous psychiatric hospitalizations was 0.04% and 0.01% of first births, respectively; for women with any psychiatric hospitalization before delivery, the incidence was 9.24% and 4.48%, respectively. For postpartum psychotic and bipolar episodes, the risk increased significantly with the recency of prepregnancy hospitalizations, number of previous hospitalizations, and length of most recent hospitalization. More than 40% of women hospitalized during the prenatal period for a bipolar or a psychotic condition were hospitalized again during the postpartum period. Approximately 90% of all postpartum psychotic and bipolar episodes occurred within the first 4 weeks after delivery. CONCLUSIONS: Almost 10% of women hospitalized for psychiatric morbidity before delivery develop postpartum psychosis after their first birth. This underscores the need for obstetricians to assess history of psychiatric symptoms and, with pediatric and psychiatric colleagues, to optimize the treatment of mothers with psychiatric diagnoses through childbirth.
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21.
  • He, Wei, et al. (författare)
  • Pregnancy outcomes in women with a prior cervical intraepithelial neoplasia grade 3 diagnosis : a nationwide population-based cohort study with sibling comparison design
  • 2022
  • Ingår i: Annals of Internal Medicine. - Stockholm : Karolinska Institutet, Dept of Medical Epidemiology and Biostatistics. - 0003-4819. ; 175:2, s. 210-
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Background: Treatment of cervical intraepithelial neoplasia grade 3 (CIN3) removes or destroys part of the cervix and might subsequently influence pregnancy outcomes. Objective: To investigate pregnancy outcomes in women diagnosed with CIN3. Design: Population- and sibling-matched cohort study. Setting: Sweden, 1973-2018. Participants: General population comparison included 78 450 singletons born to women diagnosed with CIN3 and 784 500 matched singletons born to women in the general population who had no CIN3 diagnosis; sibling comparison included 23 199 singletons born to women diagnosed with CIN3 and 28 135 singletons born to their sisters without a CIN3 diagnosis. Measurements: Preterm birth, including spontaneous or iatrogenic preterm birth; Infection-related outcomes, including chorioamnionitis and infant sepsis; and early neonatal death, defined as death during the first week after birth. Results: Compared with the matched general population, women previously diagnosed with CIN3 were more likely to have a preterm birth especially extremely preterm (22-28 weeks; OR, 3.00; 95% CI, 2.69-3.34) and spontaneous preterm (OR, 2.12; 95% CI, 2.05-2.20) birth, infection-related outcomes including chorioamnionitis (OR, 3.23; 95% CI, 2.89-3.62) and infant sepsis (OR, 1.72; 95% CI, 1.60-1.86), and early neonatal death (OR, 1.83; 95% CI, 1.61-2.09). Sibling comparison analyses rendered largely similar results. Over time the risk difference attenuated for all outcomes and disappeared for early neonatal death. Limitations: Lack of data on CIN3 treatment and spontaneous abortion. Conclusion: Prior history of CIN 3 is associated with adverse pregnancy outcomes even after accounting for familial factors. Decreasing risk estimates over time suggest that adverse pregnancy outcomes among women diagnosed with CIN3 may be minimized by improving treatment modalities.
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22.
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23.
  • Herweijer, Eva, et al. (författare)
  • Association of varying number of doses of quadrivalent human papillomavirus vaccine with incidence of condyloma.
  • 2014
  • Ingår i: JAMA: The Journal of the American Medical Association. - : American Medical Association (AMA). - 1538-3598 .- 0098-7484. ; 311:6, s. 597-603
  • Tidskriftsartikel (refereegranskat)abstract
    • Determining vaccine dose-level protection is essential to minimize program costs and increase mass vaccination program feasibility. Currently, a 3-dose vaccination schedule is recommended for both the quadrivalent and bivalent human papillomavirus (HPV) vaccines. Although the primary goal of HPV vaccination programs is to prevent cervical cancer, condyloma related to HPV types 6 and 11 is also prevented with the quadrivalent vaccine and represents the earliest measurable preventable disease outcome for the HPV vaccine.
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24.
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25.
  • Hortlund, Maria, et al. (författare)
  • Cervical cancer screening in Sweden 2014-2016.
  • 2018
  • Ingår i: PloS one. - : Public Library of Science (PLoS). - 1932-6203. ; 13:12
  • Tidskriftsartikel (refereegranskat)abstract
    • To enable incremental optimization of screening, regular reporting of quality indicators is required.To report key quality indicators and basic statistics about cervical screening in Sweden.We collected individual level data on all cervical cytologies, histopathologies, human papillomavirus tests and all invitations for cervical screening in Sweden during 2013-2016.There were over 2,278,000 cervical samples collected in Sweden in 2014-2016. Organized samples (resulting from an invitation) constituted 69% of samples. The screening test coverage of all resident women aged 23-60 was 82%. The coverage has slowly increased for >10 years. There is large variability between counties (from 71% to 92%) over time. There were 25,725 women with high-grade lesions in cytology during 2013-2015. Only 96% of these women had a follow-up histopathology within a year. Cervical cancer incidence showed an increasing trend.Key quality indicators such as population coverage and follow-up rates were stable or improving, but there was nevertheless an unexplained cervical cancer increase.
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26.
  • Hultman, C M, et al. (författare)
  • Perinatal risk factors for infantile autism
  • 2002
  • Ingår i: Epidemiology. - : Ovid Technologies (Wolters Kluwer Health). - 1044-3983 .- 1531-5487. ; 13:4, s. 417-423
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. Etiologic hypotheses in infantile autism suggest a strong genetic component, as well as possible environmental risks linked to early fetal development. We evaluated the association of maternal, pregnancy, delivery, and infant characteristics and risk of infantile autism. Methods. We conducted a case-control study nested within a population-based cohort (all Swedish children born in 1974-1993). We used prospectively recorded data from the Swedish Birth Register, which were individually linked to the Swedish Inpatient Register. Cases were 408 children (321 boys and 87 girls) discharged with a main diagnosis ion infantile autism from any hospital in Sweden before 10 years of age in the period 1987-1994, plus 2,040 matched controls. Conditional logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Results. The risk of autism was associated with daily smoking in early pregnancy (OR = 1.4; CI = 1.1-1.8), maternal birth outside Europe and North America (OR - 3.0; CI = 1.7-5.2), cesarean delivery (OR = 1.6; CI = 1.1-2.3), being small for gestational age (SGA; OR = 2.1; CI = 1.1-3.0), a 5-minute Apgar score below 7 (OR = 3.2, CI = 1.2-8.2), and congenital malformations (OR = 1.8, CI = 1.1-3.1). No association was found between autism and head circumference, maternal diabetes, being a twin, or season of birth. Conclusions. Our findings suggest that intrauterine and neonatal factors related to deviant intrauterine growth or fetal distress are important in the pathogenesis of autism.
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27.
  • Jukkala, Tanya, et al. (författare)
  • Age, period and cohort effects on suicide mortality in Russia, 1956-2005
  • 2017
  • Ingår i: BMC Public Health. - : Springer Science and Business Media LLC. - 1471-2458. ; 17
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Russian suicide mortality rates changed rapidly over the second half of the twentieth century. This study attempts to differentiate between underlying period and cohort effects in relation to the changes in suicide mortality in Russia between 1956 and 2005. Methods: Sex-and age-specific suicide mortality data were analyzed using an age-period-cohort (APC) approach. Descriptive analyses and APC modeling with log-linear Poisson regression were performed. Results: Strong period effects were observed for the years during and after Gorbachev ' s political reforms (including the anti-alcohol campaign) and for those following the break-up of the Soviet Union. After mutual adjustment, the cohort-and period-specific relative risk estimates for suicide revealed differing underlying processes. While the estimated period effects had an overall positive trend, cohort-specific developments indicated a positive trend for the male cohorts born between 1891 and 1931 and for the female cohorts born between 1891 and 1911, but a negative trend for subsequent cohorts. Conclusions: Our results indicate that the specific life experiences of cohorts may be important for variations in suicide mortality across time, in addition to more immediate effects of changes in the social environment.
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28.
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29.
  • Kasiman, Katherine, et al. (författare)
  • Common Familial Effects on Ischemic Stroke and Myocardial Infarction: A Prospective Population-Based Cohort Study
  • 2014
  • Ingår i: Frontiers in Cardiovascular Medicine. - : Frontiers Media SA. - 2297-055X. ; , s. 1-10-
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND:Recent genome-wide association studies suggest some overlap of genetic determinants of ischemic stroke (IS) and myocardial infarction (MI). This study aimed to assess shared familial risk between IS and MI in a large, population-wide cohort study.METHODS:Study participants free of IS and MI and their affected siblings were extracted from the Swedish Hospital Discharge and Cause of Death Registers between 1987 and 2007, forming an exposed sib-pair. They were matched by birth year of both siblings and calendar period to up to five unexposed sib-pairs. Stratified Cox regression analyses were used to assess familial risk of MI and IS in those exposed to having a sibling with IS (n = 31,659) and MI (n = 62,766), respectively, compared to unexposed (n = 143,728 and 265,974).RESULTS:The overall risk of MI when exposed to having a sibling with IS was statistically significantly increased (RR, 1.44; 95% CI, 1.34-1.55, p < 0.001) to a similar extent as risk of IS when exposed to having a sibling with MI (RR, 1.41; 95% CI, 1.32-1.50, p < 0.001). The familial risks were similar in full siblings for both groups (RR for MI, 1.46; 95% CI, 1.35-1.58, p < 0.001; and RR for IS, 1.40; 95% CI, 1.30-1.40, p < 0.001) and half siblings (RR for MI, 1.29; 95% CI, 1.05-1.59, p < 0.001; and RR for IS, 1.38; 95% CI, 1.16-1.65, p < 0.001).CONCLUSION:This large, population-wide study indicates that there is considerable overlap of familial risk between IS and MI.
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30.
  • Kasiman, Katherine, et al. (författare)
  • Familial effects on ischemic stroke : the role of sibling kinship, sex, and age of onset
  • 2012
  • Ingår i: Circulation. - 1942-325X .- 1942-3268. ; 5:2, s. 226-233
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Previous studies on familial risk of ischemic stroke have supported genetic influence on the disease incidence. This study aimed to characterize these familial effects in a nationwide population-based study by taking into account sibling relations, sex of siblings, and age of onset, with respect to ischemic stroke incidence.METHODS AND RESULTS: Incident ischemic stroke cases identified from the Swedish Hospital Discharge and Cause of Death Registers between 1987 and 2007 were linked to their stroke-free siblings (study participants), forming an exposed sib-pair. Each exposed sib-pair was matched up to 5 unexposed sib-pairs from the Multi-Generation Registry by birth and calendar years. Incident ischemic stroke risk was assessed using hazard estimates obtained from stratified Cox regression analyses. A total of 30 735 exposed and 152 391 unexposed study participants were included in the analyses. The overall risk of incident ischemic stroke when exposed was significantly increased (relative risk, 1.61; 95% confidence interval, 1.48-1.75; P<0.001). Familial risk was higher in full (relative risk, 1.64; 95% confidence interval, 1.50-1.81; P<0.001) than in half (relative risk, 1.41; 95% confidence interval, 1.10-1.82; P=0.007) siblings. Familial risk of early ischemic stroke almost doubled when exposed to early ischemic stroke (relative risk, 1.94; 95% confidence interval, 1.41-2.67; P<0.001).CONCLUSIONS: There was a 60% increased risk for ischemic stroke in individuals having a sibling with prior stroke. The familial effect was even higher for full-sibling relations. Familial effects were observed in both male and female individuals, and no differential effects depending on the sex of either of the siblings were found.
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31.
  • Kennedy, Beatrice, 1982-, et al. (författare)
  • Loss of a parent and the risk of cancer in early life : a nationwide cohort study
  • 2014
  • Ingår i: Cancer Causes and Control. - Dordrecht, Netherlands : Springer. - 0957-5243 .- 1573-7225. ; 25:4, s. 499-506
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: While early-life exposure to stress has been associated with subsequent psychiatric and cardiovascular morbidity, little is known regarding its potential role in cancer development. We hypothesized that severe emotional stress, such as the loss of a parent through death during childhood, may increase the risk of cancer in early life.Method: Based on the Swedish Multi-Generation Register, we identified a cohort of 4,219,691 individuals who had both parents identifiable in the same register and followed the cohort from birth to the age of 40 years between 1961 and 2006. Through information retrieved from the Swedish Causes of Death and Cancer Registers, we ascertained death among the parents and cancer diagnosis among the cohort individuals. We used Poisson regression to calculate the relative risks (RRs) and 95 % confidence intervals (CIs).Results: Parental death was not associated with total cancer risk. However, parental death during childhood was associated with a higher risk of human papillomavirus (HPV) infection-related cancers (RR 1.4; 95 % CI 1.2-1.7), and loss during early adulthood (>18 years) entailed a higher risk of cancers of the stomach (RR 1.8; 95 % CI 1.3-2.6), lung (RR 1.7; 95 % CI 1.1-2.4), rectum (RR 1.4; 95 % CI 1.0-2.0), and breast (RR 1.1; 95 % CI 1.0-1.3). A significant association was observed for pancreatic cancer for both loss during childhood (RR 2.6; 95 % CI 1.6-4.2) and afterward (RR 2.8; 95 % CI 1.9-4.3).Conclusion: Our results suggest that severe psychological stress in early life may be associated with premature development of certain malignancies, particularly cancers related to smoking and HPV infection.
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32.
  • Khanolkar, Amal R., et al. (författare)
  • Preterm and postterm birth in immigrant- and Swedish-born parents : a population register-based study
  • 2015
  • Ingår i: European Journal of Epidemiology. - : Springer Science and Business Media LLC. - 0393-2990 .- 1573-7284. ; 30:5, s. 435-447
  • Tidskriftsartikel (refereegranskat)abstract
    • Ethnic minorities/immigrant groups tend to have increased risk for preterm birth. Less is known about this risk in diverse immigrant groups, couples of mixed ethnic-origin and in relation to duration of residence. Data from the Swedish Medical Birth Register on 1,028,303 mothers who gave birth to 1,766,026 singleton live born infants (1982–2002), was linked to the Education and Total Population Registers. Immigrant parents were identified by country of birth. Risk of early preterm, late preterm and postterm birth was analyzed using multinomial logistic regression. Polish, Yugoslavian, Iranian, South Asian, East Asian and Sub-Saharan African parents, Swedish mothers who had children with non-Swedish fathers, and parents from two different immigrant groups had higher risk of early preterm birth [adjusted relative risk (RR) (95 % CI) 1.76 (1.24–2.50), 1.57 (1.31–1.87), 1.67 (1.30–2.14), 1.52 (1.07–2.16), 1.51 (1.08–2.10), 2.03 (1.32–3.12), 1.56 (1.45–1.67), and 1.55 (1.35–1.77) respectively] compared to Swedish-born parents. South Asian, Sub-Saharan African, and East Asian immigrants had a higher risk of late preterm birth compared to Swedish-born parents. North African and Middle Eastern, Somali, and Ethiopian/Eritrean groups had increased risk of postterm birth [adjusted RR 1.31 (1.16–1.47), 2.57 (2.31–2.86), 1.85 (1.67–2.04) respectively]. Adjustment for covariates did not substantially change associations. Immigrant mothers resident <3 years had higher risk for early preterm and postterm birth compared to residents >10 years [adjusted RR 1.46 (1.24–1.71) and 1.16 (1.11–1.23) respectively]. In addition to higher risk of preterm birth in select immigrant groups, some immigrant groups are also at higher risk of postterm birth. Shorter duration of residence is associated with higher risk of non-term deliveries.
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33.
  • Knight, Ann, et al. (författare)
  • Urinary bladder cancer in Wegener's granulomatosis : risks and relation to cyclophosphamide
  • 2004
  • Ingår i: Annals of the Rheumatic Diseases. - : BMJ. - 0003-4967 .- 1468-2060. ; 63:10, s. 1307-1311
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE:To assess and characterise the risk of bladder cancer, and its relation to cyclophosphamide, in patients with Wegener's granulomatosis.METHODS:In the population based, nationwide Swedish Inpatient Register a cohort of 1065 patients with Wegener's granulomatosis, 1969-95, was identified. Through linkage with the Swedish Cancer Register, all subjects in this cohort diagnosed with bladder cancer were identified. Nested within the cohort, a matched case-control study was performed to estimate the association between cyclophosphamide and bladder cancer using odds ratios (ORs) as relative risk. In the cohort the cumulative risk of bladder cancer after Wegener's granulomatosis, and the relative prevalence of a history of bladder cancer at the time of diagnosis of Wegener's granulomatosis, were also estimated.RESULTS:The median cumulative doses of cyclophosphamide among cases (n = 11) and controls (n = 25) were 113 g and 25 g, respectively. The risk of bladder cancer doubled for every 10 g increment in cyclophosphamide (OR = 2.0, 95% confidence interval (CI) 0.8 to 4.9). Treatment duration longer than 1 year was associated with an eightfold increased risk (OR = 7.7, 95% CI 0.9 to 69). The absolute risk for bladder cancer in the cohort reached 10% 16 years after diagnosis of Wegener's granulomatosis, and a history of bladder cancer was (non-significantly) twice as common as expected at the time of diagnosis of Wegener's granulomatosis.CONCLUSION:The results indicate a dose-response relationship between cyclophosphamide and the risk of bladder cancer, high cumulative risks in the entire cohort, and also the possibility of risk factors operating even before Wegener's granulomatosis.
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34.
  • Koupil, Ilona, et al. (författare)
  • Blood pressure, hypertension and mortality from circulatory disease in men and women who survived the siege of Leningrad
  • 2007
  • Ingår i: European Journal of Epidemiology. - : Springer Science and Business Media LLC. - 0393-2990 .- 1573-7284. ; 22:4, s. 223-234
  • Tidskriftsartikel (refereegranskat)abstract
    • The population of Leningrad suffered from severe starvation, cold and psychological stress during the siege in 1941–1944. We investigated long-term effects of the siege on cardiovascular risk factors and mortality in surviving men and women. 3905 men born 1916–1935 and 1729 women born 1910–1940, resident in St Petersburg (formerly Leningrad) between 1975 and 1982, of whom a third experienced the siege as children, adolescents or young adults,were examined for cardiovascular risk factors in 1975–1977 and 1980–1982 respectively and followed till end 2005. Effects of siege exposure on bloodpressure, lipids, body size, and mortality were studied in multivariate analysis stratified by gender and period of birth, adjusted for age, smoking, alcohol and social characteristics. Women who were 6–8 years old and men who were 9–15 years-old at the peak of starvation had higher systolic blood pressure compared to unexposed subjects born during the same period of birth (fully adjusted difference 8.8, 95% CI:0.1–17.5 mm Hg in women and 2.9, 95% CI: 0.7–5.0 mm Hg in men). Mean height of women who were exposed to siege as children appeared to be greater than that of unexposed women. Higher mortality from ischaemic heart disease and cerebrovascular disease was noted in men exposed at age 6–8 and 9–15, respectively. The experience of severe stress and starvation in childhood and puberty may have long-term effects on systolic blood pressure and circulatory disease in surviving men and women with potential gender differences in the effect of siege experienced at pre-pubertal age.
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35.
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36.
  • Lagerlund, M, et al. (författare)
  • Attitudes, beliefs, and knowledge as predictors of nonattendance in a Swedish population-based mammography screening program
  • 2000
  • Ingår i: Preventive Medicine. - : Elsevier BV. - 0091-7435 .- 1096-0260. ; 31, s. 417-
  • Tidskriftsartikel (refereegranskat)abstract
    • Background. The effectiveness of mammography screening could be improved if factors that influence nonattendance were better understood. Methods. We examined attitudes, beliefs, and knowledge in relation to nonattendance in a population-based mammography screening program, using a case-control design. Data were collected from November 1997 to March 1998 through telephone interviews with 434 nonattenders and 515 attenders identified in a population-based mammography register in central Sweden. The questions asked drew primarily upon the components constituting the Health Belief Model. Results. Multivariate analysis showed that nonattendance was most common among women within the highest quartile of perceived emotional barriers, compared to women within the lowest quartile (OR = 4.81; 95% CI 2.96-7.82). Women who worried most about breast cancer were more likely to attend than those who worried least (OR = 0.09; 95% CI 0.02-0.31). Women with the highest scores of perceived benefits were more likely to attend than women with the lowest ones (OR = 0.35; 95% CI 0.08-0.75). Other factors associated with nonattendance were less knowledge about mammography and breast cancer, lack of advice from a health professional to participate, and very poor trust in health care. Conclusions, Our findings suggest that increased participation in outreach mammography screening programs can be achieved through enhancement of breast cancer awareness and possibly by reducing some of the modifiable barriers.
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37.
  • Lagerlund, M, et al. (författare)
  • Predictors of non-attendance in a population-based mammography screening programme; socio-demographic factors and aspects of health behaviour
  • 2000
  • Ingår i: European Journal of Cancer Prevention. - : Ovid Technologies (Wolters Kluwer Health). - 0959-8278 .- 1473-5709. ; 9:1, s. 25-33
  • Tidskriftsartikel (refereegranskat)abstract
    • The aim of this study was to identify predictors of non-attendance in a population-based mammography-screening programme in central Sweden, on the basis of telephone interviews with 434 non-attendees and 515 attendees identified in a mammography register, Non-attendance was studied in relation to sociodemographic factors, indicators of general health behaviour, self-rated health and experience of cancer in others and own cancer or breast problems. Being single or being non-employed were the only important socio-demographic predictors of non-attendance. Non-attendance was more likely among women who never visited a dentist, had not visited a doctor in 5 years, had never used oral contraceptives or hormone replacement therapy, had never had cervical smear tests, never drank alcohol, smoked regularly, reported no breast cancer in family or friends or own breast problems, We conclude that socio-demographic factors alone do not appear to constitute strong predictors of non-attendance, General health behaviour and previous experience of cancer and breast disease seem to be more important factors. Our results suggest that in the setting of population-based outreach mammography programmes, previous contacts with the health care system and encouragement from health professionals represent determinants of attendance.
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38.
  • Lei, Jiayao, et al. (författare)
  • High-risk human papillomavirus status and prognosis in invasive cervical cancer : A nationwide cohort study
  • 2018
  • Ingår i: PLoS Medicine. - : PUBLIC LIBRARY SCIENCE. - 1549-1277 .- 1549-1676. ; 15:10
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: High-risk human papillomavirus (hrHPV) infection is established as the major cause of invasive cervical cancer (ICC). However, whether hrHPV status in the tumor is associated with subsequent prognosis of ICC is controversial. We aim to evaluate the association between tumor hrHPV status and ICC prognosis using national registers and comprehensive human papillomavirus (HPV) genotyping.Methods and findings: In this nationwide population-based cohort study, we identified all ICC diagnosed in Sweden during the years 2002-2011 (4,254 confirmed cases), requested all archival formalin-fixed paraffin-embedded blocks, and performed HPV genotyping. Twenty out of 25 pathology bio-banks agreed to the study, yielding a total of 2,845 confirmed cases with valid HPV results. Cases were prospectively followed up from date of cancer diagnosis to 31 December 2015, migration from Sweden, or death, whichever occurred first. The main exposure was tumor hrHPV status classified as hrHPV-positive and hrHPV-negative. The primary outcome was all-cause mortality by 31 December 2015. Five-year relative survival ratios (RSRs) were calculated, and excess hazard ratios (EHRs) with 95% confidence intervals (CIs) were estimated using Poisson regression, adjusting for education, time since cancer diagnosis, and clinical factors including age at cancer diagnosis and International Federation of Gynecology and Obstetrics (FIGO) stage. Of the 2,845 included cases, hrHPV was detected in 2,293 (80.6%), and we observed 1,131 (39.8%) deaths during an average of 6.2 years follow-up. The majority of ICC cases were diagnosed at age 30-59 years (57.5%) and classified as stage IB (40.7%). hrHPV positivity was significantly associated with screen-detected tumors, young age, high education level, and early stage at diagnosis (p < 0.001). The 5-year RSR compared to the general female population was 0.74 (95% CI 0.72-0.76) for hrHPV-positive cases and 0.54 (95% CI 0.50-0.59) for hrHPV-negative cases, yielding a crude EHR of 0.45 (95% CI 0.38-0.52) and an adjusted EHR of 0.61 (95% CI 0.52-0.71). Risk of all-cause mortality as measured by EHR was consistently and statistically significantly lower for cases with hrHPV-positive tumors for each age group above 29 years and each FIGO stage above IA. The difference in prognosis by hrHPV status was highly robust, regardless of the clinical, histological, and educational characteristics of the cases. The main limitation was that, except for education, we were not able to adjust for lifestyle factors or other unmeasured confounders.Conclusions: In this study, women with hrHPV-positive cervical tumors had a substantially better prognosis than women with hrHPV-negative tumors. hrHPV appears to be a biomarker for better prognosis in cervical cancer independent of age, FIGO stage, and histological type, extending information from already established prognostic factors. The underlying biological mechanisms relating lack of detectable tumor hrHPV to considerably worse prognosis are not known and should be further investigated.
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39.
  • Lei, Jiayao, et al. (författare)
  • HPV vaccination and the risk of invasive cervical cancer
  • 2020
  • Ingår i: New England Journal of Medicine. - 0028-4793 .- 1533-4406. ; 383:14, s. 1340-1348
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND The efficacy and effectiveness of the quadrivalent human papillomavirus (HPV) vaccine in preventing high-grade cervical lesions have been shown. However, data to inform the relationship between quadrivalent HPV vaccination and the subsequent risk of invasive cervical cancer are lacking. METHODS We used nationwide Swedish demographic and health registers to follow an open population of 1,672,983 girls and women who were 10 to 30 years of age from 2006 through 2017. We assessed the association between HPV vaccination and the risk of invasive cervical cancer, controlling for age at follow-up, calendar year, county of residence, and parental characteristics, including education, household income, mother’s country of birth, and maternal disease history. RESULTS During the study period, we evaluated girls and women for cervical cancer until their 31st birthday. Cervical cancer was diagnosed in 19 women who had received the quadrivalent HPV vaccine and in 538 women who had not received the vaccine. The cumulative incidence of cervical cancer was 47 cases per 100,000 persons among women who had been vaccinated and 94 cases per 100,000 persons among those who had not been vaccinated. After adjustment for age at follow-up, the incidence rate ratio for the comparison of the vaccinated population with the unvaccinated population was 0.51 (95% confidence interval [CI], 0.32 to 0.82). After additional adjustment for other covariates, the incidence rate ratio was 0.37 (95% CI, 0.21 to 0.57). After adjustment for all covariates, the incidence rate ratio was 0.12 (95% CI, 0.00 to 0.34) among women who had been vaccinated before the age of 17 years and 0.47 (95% CI, 0.27 to 0.75) among women who had been vaccinated at the age of 17 to 30 years. CONCLUSIONS Among Swedish girls and women 10 to 30 years old, quadrivalent HPV vaccination was associated with a substantially reduced risk of invasive cervical cancer at the population level.
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40.
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41.
  • Leval, Amy, et al. (författare)
  • Quadrivalent Human Papillomavirus Vaccine Effectiveness: A Swedish National Cohort Study.
  • 2013
  • Ingår i: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 1460-2105 .- 0027-8874. ; 105:7, s. 469-474
  • Tidskriftsartikel (refereegranskat)abstract
    • BackgroundIncidence of condyloma, or genital warts (GW), is the earliest possible disease outcome to measure when assessing the effectiveness of human papillomavirus (HPV) vaccination strategies. Efficacy trials that follow prespecified inclusion and exclusion criteria may not be fully generalizable to real-life HPV vaccination programs, which target a broader segment of the population. We assessed GW incidence after on-demand vaccination with quadrivalent HPV vaccine using individual-level data from the entire Swedish population.MethodsAn open cohort of girls and women aged 10 to 44 years living in Sweden between 2006 and 2010 (N > 2.2 million) was linked to multiple population registers to identify incident GW in relation to HPV vaccination. For vaccine effectiveness, incidence rate ratios of GW were estimated using time-to-event analyses with adjustment for attained age and parental education level, stratifying on age at first vaccination.ResultsA total of 124 000 girls and women were vaccinated between 2006 and 2010. Girls and women with at least one university-educated parent were 15 times more likely to be vaccinated before age 20 years than girls and women whose parents did not complete high school (relative risk ratio = 15.45, 95% confidence interval [CI] = 14.65 to 16.30). Among those aged older than 20 years, GW rates declined among the unvaccinated, suggesting that HPV vaccines were preferentially used by women at high risk of GW. Vaccination effectiveness was 76% (95% CI = 73% to 79%) among those who received three doses of the vaccine with their first dose before age 20 years. Vaccine effectiveness was highest in girls vaccinated before age 14 years (effectiveness = 93%, 95% CI = 73% to 98%).ConclusionsYoung age at first vaccination is imperative for maximizing quadrivalent HPV vaccine effectiveness.
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42.
  • Lu, Donghao, et al. (författare)
  • Bereavement is associated with an increased risk of HPV infection and cervical cancer : an epidemiological study in Sweden
  • 2016
  • Ingår i: Cancer Research. - Philadelphia, United States : American Association for Cancer Research. - 0008-5472 .- 1538-7445. ; 76:3, s. 643-651
  • Tidskriftsartikel (refereegranskat)abstract
    • Grief over the loss of a family member may cause physical and mental illness, but an association between bereavement and cancer risk has not been established. Based on the Swedish National Cervical Screening Register (1969-2011) including 14,011,269 smears from 2,466,107 women, we conducted two nested case-control studies to examine the associations of bereavement (i.e., loss of a family member due to death) with abnormal cytology (390,310 first abnormal and 1,951,319 normal smears) and in situ/invasive cervical cancer (75,128 case and 375,640 control women), both individually matched on year of birth and screening adherence. Among 1,696 of the control women, we further investigated bereavement in association with HPV infection, both HPV16 and other HPV types. Bereavement was consistently associated with a 4-9% increased risk for first abnormal cytology, in situ and invasive cervical cancer (all P<0.02). The associations became stronger when multiple losses, loss of child, sibling or spouse, and loss due to unnatural cause were analyzed separately (P for trend or difference<0.0001), and for women with high screening adherence (P for difference<0.05). Among 1,696 women who had not developed cervical cancer, we further investigated the link between bereavement and HPV infection. Bereavement was associated with a 62% increased risk of HPV16 infection, high viral load, and recurrent infection, and was also more strongly associated with HPV infections designated as high-risk compared to low-risk determinants of cervical carcinogenesis. Collectively, our findings demonstrate that bereavement is associated with an increased risk of developing cervical cancer. Further, they suggest that this association may be attributed to stress-induced oncogenic HPV infections.
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43.
  • Malki, Ninoa, et al. (författare)
  • Short-term and long-term case-fatality rates for myocardial infarction and ischaemic stroke by socioeconomic position and sex : a population-based cohort study in Sweden, 1990-1994 and 2005-2009
  • 2019
  • Ingår i: BMJ Open. - : BMJ. - 2044-6055. ; 9:7
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: Case-fatality rates (CFRs) for myocardial infarction (MI) and ischaemic stroke (IS) have decreased over time due to better prevention, medication and hospital care. It is unclear whether these improvements have been equally distributed according to socioeconomic position (SEP) and sex. The aim of this study is to analyse differences in short-term and long-term CFR for MI and IS by SEP and sex between the periods 1990-1994 to 2005-2009 for the entire Swedish population.DESIGN: Population-based cohort study based on Swedish national registers.METHODS: We used logistic regression and flexible parametric models to estimate short-term CFR (death before reaching the hospital or on the disease event day) and long-term CFR (1 year case-fatality conditional on surviving short-term) across five distinct SEP groups, as well as CFR differences (CFRDs) between SEP groups for both MI and IS from 1990-1994 to 2005-2009.RESULTS: Overall short-term CFR for both MI and IS decreased between study periods. For MI, differences in short-term and long-term CFR between the least and most favourable SEP group were generally stable, except in long-term CFR among women; intermediate SEP groups mostly managed to catch up with the most favourable SEP group. For IS, short-term CFRD generally decreased compared with the most favourable group; but long-term CFRD were mostly stable, except for an increase for older subjects.CONCLUSION: Despite a general decline in CFR for MI and IS across all SEP groups and both sexes as well as some reductions in CFRD, we found persistent and even increasing CFRD among the least advantaged SEP groups, older patients and women. We speculate that targeted prevention rather than treatment strategies have the potential to reduce these inequalities.
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44.
  • Malki, Ninoa, et al. (författare)
  • Temporal trends in incidence of myocardial infarction and ischemic stroke by socioeconomic position in Sweden 1987-2010
  • 2014
  • Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 9:8, s. e105279-
  • Tidskriftsartikel (refereegranskat)abstract
    • Background We analyzed temporal trends in the incidence of myocardial infarction and ischemic stroke in Sweden by socioeconomic position and investigated whether social inequalities in incidence of these diseases changed over time.Materials and Methods We studied a cohort of almost three million Swedish residents born between 1932 and 1960 followed from 1987 until 2010. Incident cases of myocardial infarction and ischemic stroke were identified in the Swedish National Inpatient Register and Cause of Death Register. Socioeconomic position was retrieved from the Population and Housing Censuses. Incidence rates of myocardial infarction and ischemic stroke and incidence rate ratios comparing levels of socioeconomic position were estimated using flexible parametric survival models adjusted for calendar year, attained age, sex, and birth country.Results The overall incidences of myocardial infarction and ischemic stroke decreased over time among men, but were stable over time among women. With regard to ischemic stroke incidence, socioeconomic inequality increased over time in the age group 55 to 59: the incidence rate ratios for low manual compared to high non-manual increased from 1.3 (95% CI: 1.2-1.4) in 1997 to 1.5 (1.4-1.7) in 2010 among men, and from 1.4 (1.3-1.6) in 1997 to 2.1 (1.8-2.5) in 2010 among women. The socioeconomic inequality in incidence of myocardial infarction was stable over time for both men and women.Conclusion There was a decrease in myocardial infarction and ischemic stroke incidence over time among men but no significant change for women. Our study highlights existing, and in some cases increasing, social inequalities in the incidence of cardiovascular diseases.
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45.
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46.
  • Näsman, Anders, et al. (författare)
  • Incidence of human papillomavirus (HPV) positive tonsillar carcinoma in Stockholm, Sweden : an epidemic of viral-induced carcinoma?
  • 2009
  • Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136 .- 1097-0215. ; 125:2, s. 362-6
  • Tidskriftsartikel (refereegranskat)abstract
    • In the county of Stockholm, between 1970 and 2002, we have previously reported a 3-fold parallel increase in the incidence of tonsillar squamous cell carcinoma (SCC) and the proportion of human papillomavirus (HPV) positive tonsillar SCC. Here, we have followed the above parameters in all patients (n = 120) diagnosed with tonsillar SCC during 2003-2007 in the same area, and also in correlation to our previous data. Ninety-eight pretreatment biopsies were available and presence of HPV DNA and HPV-16 E6 and E7 RNA were tested by polymerase chain reaction (PCR) and RT-PCR. Incidence data were obtained from the Swedish Cancer Registry. Data reported from 1970 to 2002 were also obtained for comparison. HPV DNA was present in 83 of 98 (85%) of the tonsillar SCC biopsies from 2003 to 2007 and 77 of these were HPV-16 positive. HPV-16 E6 and E7 RNA were found in 98% of 52 analyzed HPV-16 positive cases. The proportion of HPV-positive cancers had significantly increased both from 1970 to 2007 (p < 0.0001) as well from 2000 to 2007 (p < 0.01), with 68% (95% confidence interval (CI), 53-81) 2000-2002; 77% (95% CI, 63-87) 2003-2005; and 93% (95% CI, 82-99) 2006-2007. The incidence rate of HPV-positive tumors almost doubled each decade between 1970 and 2007, in parallel with a decline of HPV-negative tumors. In conclusion, the incidence of HPV-positive cancers is still increasing in the County of Stockholm, suggesting an epidemic of a virus-induced carcinoma, with soon practically all tonsillar SCC being HPV positive, as in cervical cancer.
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47.
  • Osby, U, et al. (författare)
  • Mortality and causes of death in schizophrenia in Stockholm County, Sweden
  • 2000
  • Ingår i: Schizophrenia Research. - 0920-9964 .- 1573-2509. ; 45:1-2, s. 21-28
  • Tidskriftsartikel (refereegranskat)abstract
    • A study of mortality for all patients with a first hospital diagnosis of schizophrenia in Stockholm County, Sweden, during 1973 to 1995 was performed, by linking the in-patient register with the national cause-of-death register. Overall and cause-specific standardized mortality ratios (SMR) were calculated by 5-year age classes and 5-year calendar time periods. The number of excess deaths was calculated by reducing the observed number of deaths by those expected. Our results confirmed a marked increase in mortality in schizophrenia both in males and females. Natural (somatic) causes of death was the main cause of excess deaths, with more than half of the excess deaths in females, and almost half of the excess deaths in males. Suicide was the specific cause of the largest number of excess deaths in males, while in females it was cardiovascular disease. SMRs were increased in both natural and unnatural causes of death, with 2.8 for males and 2.4 for females for all deaths, but were highest in suicide with 15.7 for males and 19.7 for females, and in unspecified violence with 11.7 for males and 9.9 for females. SMRs in suicide were especially high in young patients in the first year after the first diagnosis.
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48.
  • Osby, U, et al. (författare)
  • Time trends in first admissions for schizophrenia and paranoid psychosis in Stockholm County, Sweden
  • 2001
  • Ingår i: Schizophrenia Research. - 0920-9964 .- 1573-2509. ; 47:2-3, s. 247-254
  • Tidskriftsartikel (refereegranskat)abstract
    • Several studies have reported decreasing time trends in first diagnosed schizophrenia patients. The aim of this: study was to analyze time trends for first admissions with a diagnosis of schizophrenia or a diagnosis of either schizophrenia or paranoid psychosis during 1978-1994 in Stockholm County, Sweden, with a population of around 1.8 million. Information about first psychiatric admission with the diagnosis schizophrenia or paranoid psychosis for residents of Stockholm County was obtained from the Swedish population-based psychiatric inpatient register. Age-adjusted average yearly changes in first hospitalization rates were estimated in a Poisson regression model. Time trends in first admission rates were calculated from 1978 to 1994, while admissions during 1971 to 1977 were observed only to eliminate later re-admissions. First admissions for schizophrenia declined by 1.9% annually for females and by 1.3% for males, while first admissions for schizophrenia and paranoid psychosis together were unchanged over the study period for both genders. Our results indicate that the incidence of schizophrenia and paranoid psychosis taken together was essentially the same over the studied time period in Stockholm County, and that the apparent decline in first admission rates for schizophrenia may be an effect of changes in clinical diagnosis over time.
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49.
  • Rosling, Agneta M., et al. (författare)
  • Mortality of Eating Disorders : A Follow-Up Study of Treatment in a Specialist Unit 1974-2000
  • 2011
  • Ingår i: International Journal of Eating Disorders. - : Wiley. - 0276-3478 .- 1098-108X. ; 44:4, s. 304-310
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To study excess mortality, causes of death, and co-morbidity in patients with eating disorder (ED), treated in a Swedish specialist facility. Method: A retrospective cohort study of 201 patients with ED followed from 1974 to year 2001 in the Swedish Causes of Death Register (SCODR). Standardized mortality ratio (SMR) was calculated with respect to the Swedish population, by gender, age, and calendar time. Results: In the complete follow-up of 201 patients, 23 had died. At a mean follow-up of 14.3 years the overall SMR was 10. Patients with body mass index (BMI) over 11.5 had an average SMR of about 7 and for those with BMI lower than 11.5 had SMR above 30. Six patients died from AN/starvation, nine due to suicide, and eight from other causes. Discussion: SMR in anorexia nervosa (AN) is high but not in bulimia nervosa. A risk stratification of AN, based on BMI is suggested.
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50.
  • Samir, Raghad, 1968- (författare)
  • Tissue tumor marker expression in normal cervical tissue and in cervical intraepithelial neoplasia, for women who are at high risk of human papilloma virus infection, are smokers, contraceptive users or in fertile age
  • 2015
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • The aim of this research was to study the correlation between tissue tumor marker expression and HR-HPV infection, smoking, hormonal contraceptive use and sex steroids in women with cervical intraepithelial neoplasia or normal epithelium. The study investigated the expression of 11 tumor markers in cervical biopsies obtained from 228 women with different diagnoses ranging from normal cervical epithelium to various stages of CIN. 188 women were recruited at our colposcopy clinic (out-patient surgery, Department of Obstetrics and Gynecology, Falun Hospital) for laser cervical conization or a directed punch biopsy, either because of a vaginal smear (Pap smear) that showed cytological findings suggesting CIN, or because of repeated findings showing atypical squamous cells of undetermined significance (ASCUS). For 40 volunteers, punch biopsies were taken from the normal cervical epithelium. The time period for this study was 2005-2007.Study I :  228 women, of whom 116 were tested, 64 were positive to HR-HPV. The results showed that Ki67 tumor cell proliferation index was the only marker that independently correlated to both the presence of HR-HPV and the severity of cervical lesions.Study II:  228 women, of whom 83 were smokers (36, 9%). Smokers showed lower expression of p53, FHIT (tumor suppressor markers) and interleukin-10 .Higher expression of Cox-2 and Ki-67 (tumor proliferation markers).Study III:  195 women who were premenopausal. There was increased p53 expression (tumor suppressor) in the progestin-IUD users compared to non-users. Decreased IL-10 expression (immunological marker) was observed in both COC users and any progestin-only users.Study IV: Serum from 80 premenopausal women was available. The main finding was that the increased levels of serum progesterone and estradiol were associated with increased Cox-2 expression (proliferation marker). Serum progesterone and estradiol levels influence cellular and extracellular proteins which have been associated with neoplastic development in normal epithelium and CIN.Conclusion: The results of these studies support previous epidemiological findings on the role of smoking, contraceptive use and sex steroids as co-factors in development of CIN and that tumor marker expression varies in different grades of CIN.
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