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Sökning: WFRF:(Rönmark E)

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  • Rönmark, Eva, et al. (författare)
  • Incidence of asthma in adults report from the Obstructive Lung Disease in Northern Sweden Study
  • 1997
  • Ingår i: Allergy. - Wiley-Blackwell Publishing Ltd.. - 0105-4538. ; 52:11
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Bjerg, A., et al. (författare)
  • Gas, dust, and fumes exposure is associated with mite sensitization and with asthma in mite-sensitized adults.
  • 2015
  • Ingår i: Allergy. European Journal of Allergy and Clinical Immunology. - 0105-4538. ; 70:5, s. 604-607
  • Tidskriftsartikel (refereegranskat)abstract
    • Occupational exposure to gas, dust, and fumes (GDF) increases the risk of asthma and eczema. We investigated the role of sensitization in the association between GDF and allergic conditions. A population-based sample of 788 adults from the West Sweden Asthma Study completed questionnaires and skin prick tests. After adjustment for confounders, GDF exposure was associated with a doubled risk of sensitization to mites, but not with other allergens. Mite sensitization also modified the effect of GDF on asthma. In mite-sensitized subjects, GDF was associated with physician-diagnosed asthma, adjusted OR 2.9 (1.2-7.2), and with wheeze, OR 2.4 (1.1-5.3). In non-mite-sensitized subjects, the corresponding ORs were 1.1 (0.5-2.6) and 0.6 (0.3-1.3). GDF was independently associated with eczema regardless of mite sensitization, but not with rhinitis. These novel findings suggest that components of GDF may act as adjuvants that facilitate sensitization to mites and that mite-sensitized individuals may be especially susceptible to inhalant occupational exposures.
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