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Sökning: WFRF:(Rönmark E)

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2.
  • Thorgeirsson, T. E., et al. (författare)
  • A rare missense mutation in CHRNA4 associates with smoking behavior and its consequences
  • 2016
  • Ingår i: Molecular Psychiatry. - 1359-4184. ; 21:5, s. 594-600
  • Tidskriftsartikel (refereegranskat)abstract
    • Using Icelandic whole-genome sequence data and an imputation approach we searched for rare sequence variants in CHRNA4 and tested them for association with nicotine dependence. We show that carriers of a rare missense variant (allele frequency = 0.24%) within CHRNA4, encoding an R336C substitution, have greater risk of nicotine addiction than non-carriers as assessed by the Fagerstrom Test for Nicotine Dependence (P = 1.2 x 10(-4)). The variant also confers risk of several serious smoking-related diseases previously shown to be associated with the D398N substitution in CHRNA5. We observed odds ratios (ORs) of 1.7-2.3 for lung cancer (LC; P = 4.0 x 10(-4)), chronic obstructive pulmonary disease (COPD; P = 9.3 x 10(-4)), peripheral artery disease (PAD; P = 0.090) and abdominal aortic aneurysms (AAAs; P = 0.12), and the variant associates strongly with the early-onset forms of LC (OR = 4.49, P = 2.2 x 10(-4)), COPD (OR = 3.22, P = 2.9 x 10(-4)), PAD (OR = 3.47, P = 9.2 x 10(-3)) and AAA (OR = 6.44, P = 6.3 x 10(-3)). Joint analysis of the four smoking-related diseases reveals significant association (P = 6.8 x 10(-5)), particularly for early-onset cases (P = 2.1 x 10(-7)). Our results are in agreement with functional studies showing that the human alpha 4 beta 2 isoform of the channel containing R336C has less sensitivity for its agonists than the wild-type form following nicotine incubation.
3.
  • Ronmark, E, et al. (författare)
  • Incidence of asthma in adults : report from the Obstructive Lung Disease in Northern Sweden Study
  • 1997
  • Ingår i: Allergy. European Journal of Allergy and Clinical Immunology. - 0105-4538. ; 52:11, s. 1071-8
  • Tidskriftsartikel (refereegranskat)abstract
    • Incidence studies offer a better opportunity to study risk factors for asthma than do prevalence studies. However, regular prospective follow-ups of large cohorts are difficult to perform, and that is why direct measurement of the incidence rate of asthma is almost impossible. Thus, cross-sectional follow-up studies of defined cohorts can be used to provide data on incidence. In 1986, a postal questionnaire survey on respiratory symptoms and diseases was performed in the northernmost province of Sweden. The population sample comprised all subjects born in 1919-20, 1934-5, and 1949-50 in eight representative areas of the province, which comprises 25% of the total area of Sweden. Completed answers were given by 5698 subjects (86%) of the 6610 subjects invited to the study. In 1992, the cohort was invited to a follow-up survey during the same season as in 1986, and 6215 subjects were traced. Of the 5393 subjects who answered the questionnaire, 4932 had participated in the 1986 survey, or 87% of those who participated in 1986. For the period 1986-92, the cumulative incidences of asthma were 4.9 and 5.0%, respectively, as assessed by the questions, "Have you ever had asthma?" and "Have you been diagnosed as having asthma by a physician?" Thus, the results indicate a mean annual cumulative incidence of asthma of 0.8%. After correction of the results for subjects who were diagnosed as having asthma in the clinical part later in the 1986 study, the mean annual cumulative incidence of asthma was found to be 0.5%. Risk factors were family history of asthma (OR 3.46) and current and former smoking, while female sex was a strong trend.
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  • Stallberg, B, et al. (författare)
  • Living with asthma in Sweden - The ALMA study
  • 2003
  • Ingår i: Respiratory Medicine. - Elsevier. - 0954-6111. ; 97:7, s. 835-843
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Recently performed studies have found a number of limitations in the daily lives of asthmatics, and a large disparity between the perception of the sufferers and what health care professionals believe matters to asthmatics. Aim: What matters to Swedish asthma patients, what medicines do they use, and are they compliant with given prescriptions? A further aim was to compare perceptions about asthma and asthma management in asthmatics and among Swedish general practitioners (GP). Design: A structured telephone interview of a representative sample of Swedish asthmatics, and a mailed questionnaire survey among GPs from different parts of Sweden. Methods: Screening by telephone of a random sample of 10,350 subjects aged 18-45. Of those, 240 were subsequently selected for a detailed structured telephone interview about their asthma. A mailed structured questionnaire containing similar questions to those asked of the asthmatics was sent to 600 GPs, and 139 returned completed answers. Results: 16% of the asthmatics reported (asthma) symptoms occurring every day during the previous month. Nocturnal symptoms at least twice per week were reported by 19%. Both these were reported by considerably higher proportions of the asthmatics than the GPs had expected. A large majority classified their disease as mild or very mild, although great majority reported frequent symptoms. Activities or situations which caused symptoms of asthma often or "now and then" were physical exertion, 67%, bad weather, 59%, contact with animals/pets, 58%, and visits to cafés or restaurants, 36%, and several asthmatics avoided these activities due to their asthma. Conclusion: A great majority of asthmatics report a large number of symptoms and limitations in their daily living in proportions which were roughly expected by the GPs. © 2003 Elsevier Science Ltd. All rights reserved.
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7.
  • Andersson, Martin, et al. (författare)
  • Remission and Persistence of Asthma Followed From 7 to 19 Years of Age
  • 2013
  • Ingår i: Pediatrics. - 0031-4005. ; 132:2, s. 435-442
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND AND OBJECTIVE: To date, a limited number of population-based studies have prospectively evaluated the remission of childhood asthma. This work was intended to study the remission and persistence of childhood asthma and related factors. METHODS: In 1996, a questionnaire was distributed to the parents of all children aged 7 to 8 years in 3 municipalities in northern Sweden, and 3430 (97%) participated. After a validation study, 248 children were identified as having asthma; these children were reassessed annually until age 19 years when 205 (83%) remained. During the follow-up period lung function, bronchial challenge testing, and skin prick tests were performed. Remission was defined as no use of asthma medication and no wheeze during the past 12 months as reported at endpoint and in the 2 annual surveys preceding endpoint (ie, for >= 3 years). RESULTS: At age 19 years, 21% were in remission, 38% had periodic asthma, and 41% persistent asthma. Remission was more common among boys. Sensitization to furred animals and a more severe asthma (asthma score >= 2) at age 7 to 8 years were both inversely associated with remission, odds ratio 0.14 (95% confidence interval 0.04-0.55) and 0.19 (0.07-0.54), respectively. Among children with these 2 characteristics, 82% had persistent asthma during adolescence. Asthma heredity, damp housing, rural living, and smoking were not associated with remission. CONCLUSIONS: The probability of remission of childhood asthma from age 7- to 8-years to age 19 years was largely determined by sensitization status, particularly sensitization to animals, asthma severity, and female gender, factors all inversely related to remission.
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8.
  • Backman, H., et al. (författare)
  • Decreased prevalence of moderate to severe COPD over 15 years in northern Sweden
  • 2016
  • Ingår i: Respiratory Medicine. - 0954-6111. ; 114, s. 103-110
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: The burden of COPD in terms of mortality, morbidity, costs and prevalence has increased worldwide. Recent results on prevalence in Western Europe are conflicting. In Sweden smoking prevalence has steadily decreased over the past 30 years.AIM: The aim was to study changes in prevalence and risk factor patterns of COPD in the same area and within the same age-span 15 years apart.MATERIAL AND METHODS: Two population-based cross-sectional samples in ages 23-72 years participating at examinations in 1994 and 2009, respectively, were compared in terms of COPD prevalence, severity and risk factor patterns. Two different definitions of COPD were used; FEV1/FVC < LLN and FEV1/FVC < 0.7. The severity of COPD was assessed by FEV1, both as % of predicted and in relation to the LLN.RESULTS: The prevalence of COPD decreased significantly from 9.5% to 6.3% (p = 0.030) according to the FEV1/FVC < LLN criterion, while the decrease based on the FEV1/FVC < 0.7 criterion from 10.5% to 8.5% was non-significant. The prevalence of moderate to severe COPD decreased substantially and significantly, and the risk factor pattern was altered in 2009 when, beside age and smoking, also socio-economic status based on occupation was significantly associated with COPD.CONCLUSIONS: Changes in both prevalence and risk factor patterns of COPD were observed between surveys. Following a continuing decrease in smoking habits over several decades, a decrease in the prevalence of moderate to severe COPD was observed from 1994 to 2009 in northern Sweden.
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9.
  • Backman, H., et al. (författare)
  • Evaluation of the global lung function initiative 2012 reference values for spirometry in a Swedish population sample
  • 2015
  • Ingår i: Bmc Pulmonary Medicine. - 1471-2466. ; 15
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: The Global Lung Function Initiative 2012 (GLI) reference values are currently endorsed by several respiratory societies but evaluations of applicability for adults resident in European countries are lacking. The aim of this study was to evaluate if the GLI reference values are appropriate for an adult Caucasian Swedish population.Methods: During 2008-2013, clinical examinations including spirometry were performed on general population samples in northern Sweden, in which 501 healthy Caucasian non-smokers were identified. Predicted GLI reference values and Z-scores were calculated for each healthy non-smoking subject and the distributions and mean values for FEV1, FVC and the FEV1/FVC ratio were examined. The prevalence of airway obstruction among these healthy non-smokers was calculated based on the Lower Limit of normal (LLN) criterion (lower fifth percentile) for the FEV1/FVC ratio. Thus, by definition, a prevalence of 5% was expected.Results: The Z-scores for FEV1, FVC and FEV1/FVC were reasonably, although not perfectly, normally distributed, but not centred on zero. Both predicted FEV1 and, in particular, FVC were lower compared to the observed values in the sample. The deviations were greater among women compared to men. The prevalence of airway obstruction based on the LLN criterion for the FEV1/FVC ratio was 9.4% among women and 2.7% among men.Conclusions: The use of the GLI reference values may produce biased prevalence estimates of airway obstruction in Sweden, especially among women. These results demonstrate the importance of validating the GLI reference values in different countries.
10.
  • Bjerg, Anders, et al. (författare)
  • Family history of asthma and atopy: in-depth analyses of the impact on asthma and wheeze in 7- to 8-year-old children.
  • 2007
  • Ingår i: Pediatrics. - 1098-4275. ; 120:4, s. 741-8
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: Development of asthma in children is influenced by interactions between genetic and environmental factors. It is unclear whether paternal or maternal histories of disease confer different risks. Previous population-based studies have not stratified analyses by child gender and sensitization status. Our aim was to study in detail the hereditary component of childhood asthma. METHODS: A population-based cohort of 3430 (97% of invited) 7- to 8-year-old school children participated in an expanded International Study of Asthma and Allergy in Childhood survey, and two thirds were skin-prick tested. Heredity was defined as a family history of (1) asthma and (2) atopy (allergic rhinitis or eczema). Multivariate analyses corrected for known risk factors for asthma. RESULTS: At ages 7 to 8, prevalence of asthma was 5.3% among the children and 9.0% among the parents. In children without parental asthma or parental atopy, the prevalence of asthma was 2.8%. Corrected for parental asthma, parental atopy was a weak but significant risk factor. There were minor differences in the impact of parental disease between sensitized and nonsensitized children and between boys and girls. CONCLUSIONS: As risk factors for childhood asthma, there were major differences between parental asthma and parental atopy. Sibling asthma was only a marker of parental disease. Interactions between parental disease and the child's allergic sensitization or gender were not statistically significant. Asthma in both parents conferred a multiplicative risk, whereas the effect of parental atopy was additive, however limited. Asthma and atopy, despite their causal relationship, are separate entities and could be inherited differently. This large, population-based, and well-characterized cohort study does not confirm parent-of-origin effects found in previous studies.
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