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  • Berntsson, John, et al. (författare)
  • Risk of Stroke in Patients With Atrial Fibrillation Is Associated With Stroke in Siblings : : A Nationwide Study
  • 2020
  • Ingår i: Journal of the American Heart Association. - Wiley-Blackwell. - 2047-9980. ; 9:3, s. 014132-014132
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: It remains unclear whether heritable factors can contribute to risk stratification for ischemic stroke in patients with atrial fibrillation (AF). We examined whether having a sibling with ischemic stroke was associated with increased risk of ischemic stroke and mortality in patients with AF. Methods and Results: In this nationwide study of the Swedish population, patients with AF and their siblings were identified from the Swedish patient registers and the Swedish MGR (Multi-Generation Register). Ischemic stroke events were retrieved from the Swedish patient registers and CDR (Cause of Death Register). Risk of ischemic stroke was compared between patients with AF with and without a sibling affected by ischemic stroke, AF, or both ischemic stroke and AF. The total study population comprised 113 988 subjects (mean age, 60±12 years) diagnosed with AF between 1989 and 2012. In total, 11 709 of them were diagnosed with a first ischemic stroke and 20 097 died during a mean follow-up time of 5.5 years for ischemic stroke and 5.9 years for mortality. After adjustment for covariates having a sibling with ischemic stroke, or both ischemic stroke and AF, was associated with increased risk of ischemic stroke (hazard ratio, 1.31; 95% CI, 1.23-1.40 or hazard ratio, 1.36; 95% CI, 1.24-1.49, respectively). Furthermore, ischemic stroke in a sibling was associated with all-cause mortality (hazard ratio, 1.09; 95% CI, 1.05-1.14). In contrast, the risk of stroke was only marginally increased for patients with AF with a spouse affected by ischemic stroke. Conclusions: Having a sibling affected by ischemic stroke confers an increased risk of ischemic stroke and death independently of traditional risk factors in patients with AF.
  • Carlsson, Axel C., et al. (författare)
  • Neighborhood socioeconomic status at the age of 40 years and ischemic stroke before the age of 50 years : A nationwide cohort study from Sweden
  • 2017
  • Ingår i: International Journal of Stroke. - Wiley-Blackwell. - 1747-4930. ; 12:8, s. 815-826
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: We aimed to study the association between neighborhood socioeconomic status at the age of 40 years and risk of ischemic stroke before the age of 50 years. Methods: All individuals in Sweden were included if their 40th birthday occurred between 1998 and 2010. National registers were used to categorize neighborhood socioeconomic status into high, middle, and low and to retrieve information on incident ischemic strokes. Hazard ratios and their 95% confidence intervals were estimated. Results: A total of 1,153,451 adults (women 48.9%) were followed for a mean of 5.5 years (SD 3.5 years), during which 1777 (0.30%) strokes among men and 1374 (0.24%) strokes among women were recorded. After adjustment for sex, marital status, education level, immigrant status, region of residence, and neighborhood services, there was a lower risk of stroke in residents from high-socioeconomic status neighborhoods (hazard ratio 0.87, 95% confidence interval 0.78–0.96), and an increased risk of stroke in adults from low-socioeconomic status neighborhoods (hazard ratio 1.16, 95% confidence interval 1.06–1.27), compared to their counterparts living in middle-socioeconomic status neighborhoods. After further adjustment for hospital diagnoses of hypertension, diabetes, heart failure, and atrial fibrillation prior to the age of 40, the higher risk in neighborhoods with low socioeconomic status was attenuated, but remained significant (hazard ratio 1.12, 95% confidence interval 1.02–1.23). Conclusions: In a nationwide study of individuals between 40 and 50 years, we found that the risk of ischemic stroke differed depending on neighborhood socioeconomic status, which calls for increased efforts to prevent cardiovascular diseases in low socioeconomic status neighborhoods.
  • Carlsson, Axel C, et al. (författare)
  • Neighbourhood socioeconomic status and coronary heart disease in individuals between 40 and 50 years.
  • 2016
  • Ingår i: Heart. - BMJ Publishing Group. - 1355-6037. ; 102:10
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: The incidence of myocardial infarction (MI) has decreased in general but not among younger middle-aged adults. We performed a cohort study of the association between neighbourhood socioeconomic status (SES) at the age of 40 and risk of MI before the age of 50 years. METHODS: All individuals in Sweden were included in the year of their 40th birthday, if it occurred between 1998 and 2010. National registers were used to categorise neighbourhood SES into high, middle and low, and to retrieve information on incident MI and coronary heart disease (CHD). Cox regression models, adjusted for marital status, education level, immigrant status and region of residence, provided an estimate of the HRs and 95% CIs for MI or CHD. RESULTS: Out of 587 933 men and 563 719 women, incident MI occurred in 2877 (0.48%) men and 932 (0.17%) women; and CHD occurred in 4400 (0.74%) men and 1756 (0.31%) women during a mean follow-up of 5.5 years. Using individuals living in middle-SES neighbourhoods as referents, living in high-SES neighbourhoods was associated with lower risk of MI in both sexes (HR (95% CI): men: 0.72 (0.64 to 0.82), women: 0.66 (0.53 to 0.81)); living in low-SES neighbourhoods was associated with a higher risk of MI (HR (95% CI): men: 1.31 (1.20 to 1.44), women: 1.28 (1.08 to 1.50)). Similar risk estimates for CHD were found. CONCLUSIONS: The results of our study suggest an increased risk of MI and CHD among residents from low-SES neighbourhoods and a lower risk in those from high-SES neighbourhoods compared with residents in middle-SES neighbourhoods.
  • Eggert, Jan, et al. (författare)
  • Country of birth and hospitalization for pelvic inflammatory disease, ectopic pregnancy, endometriosis, and infertility : a nationwide study of 2 million women in Sweden
  • 2008
  • Ingår i: Fertility and Sterility. - Elsevier. - 1556-5653. ; 90:4, s. 25-1019
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: To examine the association between country of birth and hospitalization for pelvic inflammatory disease (PID), ectopic pregnancy (EP), endometriosis, and infertility.DESIGN: Follow-up study.SETTING: Sweden.PARTICIPANT(S): A total of 2,170,177 women living in Sweden at some point between 1990 and 2004, categorized into 10 different groups according to country of birth.INTERVENTION(S): None.MAIN OUTCOME MEASURE(S): Hospitalization for PID, EP, endometriosis, and infertility.RESULTS: For PID and infertility, all groups of foreign-born women exhibited significantly increased risks compared with Swedish-born women. The highest risks of PID were found among women from southern Europe, Eritrea/Ethiopia/Somalia, and other African countries, whereas the highest risks of infertility were found among women from Middle Eastern countries, other Asian countries, and other African countries. Compared with PID and infertility, country of birth was less associated with endometriosis and EP, although some differences were found. All relative risks were adjusted for age, time period, and the women's socioeconomic status.CONCLUSION(S): Even in a country like Sweden, which offers publicly financed treatment for infertility, differences based on country of birth exist. Although data on partners' income were not available to us, it is possible that other factors besides socioeconomic factors are present in the etiology of female health problems related to infertility.
  • Friberg, Danielle, et al. (författare)
  • Parental poverty and occupation as risk factors for pediatric sleep-disordered breathing.
  • 2015
  • Ingår i: Sleep Medicine. - Elsevier. - 1878-5506. ; 16:9, s. 1169-1175
  • Tidskriftsartikel (refereegranskat)abstract
    • Previous studies have found associations between pediatric sleep-disordered breathing (SDB) and socioeconomic status (SES), as well as a neighborhood-related disadvantage. This study analyzes the association among familial SES, parental occupation, and SDB in Swedish offspring.
  • Friberg, Danielle, et al. (författare)
  • Sibling risk of pediatric obstructive sleep apnea syndrome and adenotonsillar hypertrophy
  • 2009
  • Ingår i: Sleep. - Asoociated Professional Sleep Societies. - 0161-8105. ; 32:8, s. 83-1077
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: To estimate sibling risk of hospitalization for children with sleep disordered breathing (SDB), diagnosed with (1) obstructive sleep apnea syndrome (OSAS), or (2) adenotonsillar hypertrophy in the total Swedish population.DESIGN, SETTING, AND PARTICIPANTS: Using the MigMed database at the Karolinska Institute, we divided the population of Sweden aged 0-18 years into sibling groups based on a shared mother and father and presence of a primary hospital diagnosis of OSAS or adenotonsillar hypertrophy for each individual born between 1978 and 1986, during the follow-up period 1997-2004. Individuals with at least one affected sibling were identified and the incidence rates were computed, using standardized incidence ratios (SIRs) with 95% confidence intervals (CIs). Reference groups were boys and girls with unaffected siblings of 2 or more.RESULTS: After accounting for socioeconomic status, age, and geographic region, boys with at least one sibling with OSAS had an increased risk of having OSAS (SIR, 33.2; 95% CI, 16.5-64.8), and in girls the SIR was 40.5 (19.4-81.4). For hypertrophy of the tonsils or hypertrophy of the adenoids and tonsils the corresponding SIRs were 4.53 (3.0-6.8) for boys and 4.94 (3.3-7.4) for girls.CONCLUSIONS: The study indicate an increased sibling risk of sleep disordered breathing in children, which may be due to heritable genes and/or shared environment such as increased awareness among family members or referring doctors. Caregivers should ask parents if siblings have similar symptoms, and thus offer them early treatment.
  • Goldin, Lynn R, et al. (författare)
  • Familial aggregation and heterogeneity of non-Hodgkin lymphoma in population-based samples
  • 2005
  • Ingår i: Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology. - American Association for Cancer Research. - 1055-9965. ; 14:10, s. 6-2402
  • Tidskriftsartikel (refereegranskat)abstract
    • The importance of genetic factors in the etiology of non-Hodgkin lymphoma (NHL) is suggested by case-control and cohort studies. Most previous studies have been too small to estimate accurately risks of specific categories of lymphoproliferative malignancies in relatives of NHL cases or to quantify the contribution of NHL case characteristics to familial risk. We have overcome sample size limitations and potential recall bias by using large databases from Sweden and Denmark. Diagnoses of lymphoproliferative malignancies were compared in 70,006 first-degree relatives of 26,089 NHL cases (including 7,432 with subtype information) versus 161,352 first-degree relatives of 58,960 matched controls. Relatives of NHL cases were at significantly increased risk for NHL [relative risk (RR), 1.73; 95% confidence interval (95% CI), 1.39-2.15], Hodgkin lymphoma (RR, 1.41; 95% CI, 1.0-1.97), and nonsignificantly for chronic lymphocytic leukemia (CLL; RR, 1.31; 95% CI, 0.93-1.85). No increased risk was found for multiple myeloma among case relatives. Findings with respect to siblings compared with parents and offspring or with respect to age at diagnosis of proband were inconsistent. In both populations, relatives of cases with an aggressive NHL subtype were at substantially increased risk of NHL (combined RR, 3.56; 95% CI, 1.80-7.02). We conclude that NHL has an important familial component, which is shared with Hodgkin lymphoma and CLL. We estimate that the absolute lifetime risk for a first-degree relative of an NHL case to develop NHL is 3.6% (compared with a population risk of 2.1%) and higher if the index case had an aggressive subtype of NHL.
  • Hemminki, Kari, et al. (författare)
  • Cancer risks in first-generation immigrants to Sweden
  • 2002
  • Ingår i: International Journal of Cancer. - John Wiley and Sons Inc.. - 0020-7136. ; 99:2, s. 28-218
  • Tidskriftsartikel (refereegranskat)abstract
    • We used the nationwide Swedish Family-Cancer Database to analyse cancer risks in 613,000 adult immigrants to Sweden. All the immigrants had become parents in Sweden and their median age at immigration was 24 years for men and 22 years for women. We calculated standardized incidence ratios (SIRs) and 95% confidence intervals (CIs) for 18 cancer sites using native Swedes as a reference. Data were also available from compatriot marriages. All cancer was decreased by 5% and 8% for immigrant men and women, respectively. However, most of the male increase was due to lung cancer for which male immigrants showed a 41% excess. Among individual cancer sites and immigrant countries, 110 comparisons were significant, 62 showing protection and 48 an increased risk. Most of the differences between the rates in immigrants and Swedes could be ascribed to the variation of cancer incidence in the indigenous populations. Some high immigrant SIRs were 5.05 (n = 6, 95% CI 1.82-11.06) for stomach cancer in Rumanian women and 2.41 (41, 1.73-3.27) for lung cancer in Dutch men. At some sites, such as testis, prostate, skin (melanoma), kidney, cervix and nervous system, the SIRs for immigrants were decreased; in some groups of immigrants SIRs were about 0.20. The highest rates for testicular cancer were noted for Danes and Chileans. Women from Yugoslavia and Turkey had an excess of thyroid tumours. All immigrant groups showed breast, endometrial and ovarian cancers at or below the Swedish level but the differences were no more than 2-fold.
  • Hemminki, Kari, et al. (författare)
  • Cancer risks in ulcerative colitis patients
  • 2008
  • Ingår i: International Journal of Cancer. - John Wiley and Sons Inc.. - 0020-7136. ; 123:6, s. 21-1417
  • Tidskriftsartikel (refereegranskat)abstract
    • Patients diagnosed with ulcerative colitis (UC) are known to be at an increased risk of colorectal and liver cancers and leukemia. UC is an autoimmune disease, which may present a wider spectrum of cancers. We wanted to examine the risk of cancer in a large population of UC patients in order to reach high statistical power. A UC research database was constructed by identifying UC patients from the Swedish Hospital Discharge Register and cancer patients from the Cancer Registry. Follow-up of 27,606 UC patients hospitalized for the first time during the years 1964-2004 identified 2,058 patients with cancer. Standardized incidence ratios were calculated for cancer in UC patients by comparing to subjects without hospitalization for UC. The novel tumor sites in UC patients included small intestinal (carcinoid), pancreatic, breast and prostate cancers, nonthyroid endocrine gland tumors, non-Hodgkin lymphoma and multiple myeloma. A total of 11 sites showed an increased risk, which remained at 6 sites when tumors diagnosed in the year of UC hospitalization were excluded; even chronic myeloid leukemia was in excess. Cancer risks depended on the age at first hospitalization for UC. The SIRs for colon, rectal, liver and pancreatic cancers declined by age at hospitalization for UC, while for endocrine tumors the older patients were at higher risk. Our large study identified novel subsequent cancers in UC patients. However, some of these, including small intestinal carcinoids, prostate cancers and nonthyroid endocrine tumors, may be in excess because of intensified medical surveillance of the patients.
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