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Decrease in prevalence of COPD in Sweden after decades of decrease in smoking
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine. (OLIN Unit)ORCID iD: 0000-0002-0553-8067
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2018 (English)In: European Respiratory Journal, ISSN 0903-1936, E-ISSN 1399-3003, Vol. 52Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Background: The smoking prevalence in Sweden has steadily decreased during three decades. The prevalence of COPD in Sweden in the 1990s and around the millennium shift was similar to neighboring European countries, i.e. estimated at 11-17%, and of moderate to severe COPD to 7-11%, in ages over 40y.

Aim: Has the prevalence of chronic airway obstruction (CAO) and of COPD in Sweden decreased after decades of decreasing smoking prevalence?

Methods: Within two large scale population studies in progress, the West Sweden Asthma Study (WSAS) and the Obstructive Lung Disease in Northern Sweden Studies (OLIN), the prevalence of COPD in ages 41-72y was calculated among randomly selected subjects from the general population in 2009-2012. The following post-bronchodilator definitions were used; CAO: FEV1/FVC<LLN and FEV1/FVC<0.7; moderate to severe CAO: FEV1/FVC<LLN with FEV1<LLN, and FEV1/FVC<0.7 with FEV1<80% of predicted. In line with the GOLD 2017 guidelines, both CAO and respiratory symptoms were required for the diagnosis of COPD.

Results: The prevalence of CAO based on the FEV1/FVC<LLN and FEV1/FVC<0.7 criteria, respectively, was 6.4% and 10.3%, while the corresponding prevalence of COPD was 5.6% and 8.4%. The prevalence of moderate to severe CAO was 4.0% (LLN-criterion) and 5.0% (fixed ratio-criterion) and of moderate to severe COPD 3.8% and 4.4%, respectively. Main risk factors for both CAO and COPD were smoking, male sex and increasing age.

Conclusion: As prevalence of COPD defined as chronic airway obstruction before and around the millennium shift was estimated at 11-17% in ages >40 years, the prevalence of COPD has decreased in Sweden, and the decrease in smoking over decades is probably the main causal factor.

Place, publisher, year, edition, pages
European Respiratory Society , 2018. Vol. 52
National Category
Respiratory Medicine and Allergy
Identifiers
URN: urn:nbn:se:umu:diva-155981DOI: 10.1183/13993003.congress-2018.OA1935ISI: 000455567100075OAI: oai:DiVA.org:umu-155981DiVA, id: diva2:1286648
Conference
28th International Congress of the European-Respiratory-Society (ERS), SEP 15-19, 2018, Paris, FRANCE
Note

Supplement: 62

Meeting Abstract: OA1935

Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2019-02-07Bibliographically approved

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Backman, HelenaHedman, LinneaLindberg, AnneRönmark, Eva

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