Helena Backman1, Berne Eriksson2, Eva Rönmark3, Linnea Hedman3, Caroline Stridsman4, Sven-Arne Jansson3, Anne Lindberg5, Bo Lundbäck6. 1. Dept of Public Health and Clinical Medicine, Division of Occupational and Environmental Medicine, The OLIN Unit, Umeå University, Umeå, Sweden. Electronic address: helena.backman@nll.se. 2. Dept of Internal Medicine, Central County Hospital of Halmstad, Halmstad, Sweden. 3. Dept of Public Health and Clinical Medicine, Division of Occupational and Environmental Medicine, The OLIN Unit, Umeå University, Umeå, Sweden. 4. Dept of Health Sciences, Luleå University, Luleå, Sweden. 5. Dept of Public Health and Clinical Medicine, Division of Medicine, Umeå University, Umeå, Sweden. 6. Dept of Public Health and Clinical Medicine, Division of Occupational and Environmental Medicine, The OLIN Unit, Umeå University, Umeå, Sweden; Krefting Research Centre, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden.
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.
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.
Authors: Katalin Gémes; Mats Talbäck; Karin Modig; Anders Ahlbom; Anita Berglund; Maria Feychting; Anthony A Matthews Journal: Eur J Epidemiol Date: 2020-05-18 Impact factor: 8.082
Authors: Sara Lundell; Malin Tistad; Börje Rehn; Maria Wiklund; Åsa Holmner; Karin Wadell Journal: BMC Health Serv Res Date: 2017-07-10 Impact factor: 2.655
Authors: Anne Lindberg; Robert Linder; Helena Backman; Jonas Eriksson Ström; Andreas Frølich; Ulf Nilsson; Eva Rönmark; Viktor Johansson Strandkvist; Annelie F Behndig; Anders Blomberg Journal: Eur Clin Respir J Date: 2017-12-17
Authors: Ulf Nilsson; Nicholas L Mills; David A McAllister; Helena Backman; Caroline Stridsman; Linnea Hedman; Eva Rönmark; Takeshi Fujisawa; Anders Blomberg; Anne Lindberg Journal: Respir Res Date: 2020-06-26