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  • Title: Prevalence and Population-Attributable Risk for Chronic Airflow Obstruction in a Large Multinational Study.
    Author: Burney P, Patel J, Minelli C, Gnatiuc L, Amaral AFS, Kocabaş A, Cherkaski HH, Gulsvik A, Nielsen R, Bateman E, Jithoo A, Mortimer K, Sooronbaev TM, Lawin H, Nejjari C, Elbiaze M, El Rhazi K, Zheng JP, Ran P, Welte T, Obaseki D, Erhabor G, Elsony A, Osman NB, Ahmed R, Nizankowska-Mogilnicka E, Mejza F, Mannino DM, Bárbara C, Wouters EFM, Idolor LF, Loh LC, Rashid A, Juvekar S, Gislason T, Al Ghobain M, Studnicka M, Harrabi I, Denguezli M, Koul PA, Jenkins C, Marks G, Jõgi R, Hafizi H, Janson C, Tan WC, Aquart-Stewart A, Mbatchou B, Nafees AA, Gunasekera K, Seemungal T, Anand MP, Enright P, Vollmer WM, Blangiardo M, Elfadaly FG, Buist AS, BOLD Collaborative Research Group.
    Journal: Am J Respir Crit Care Med; 2021 Jun 01; 203(11):1353-1365. PubMed ID: 33171069.
    Abstract:
    Rationale: The Global Burden of Disease program identified smoking and ambient and household air pollution as the main drivers of death and disability from chronic obstructive pulmonary disease (COPD). Objectives: To estimate the attributable risk of chronic airflow obstruction (CAO), a quantifiable characteristic of COPD, due to several risk factors. Methods: The Burden of Obstructive Lung Disease study is a cross-sectional study of adults, aged ≥40, in a globally distributed sample of 41 urban and rural sites. Based on data from 28,459 participants, we estimated the prevalence of CAO, defined as a postbronchodilator FEV1-to-FVC ratio less than the lower limit of normal, and the relative risks associated with different risk factors. Local relative risks were estimated using a Bayesian hierarchical model borrowing information from across sites. From these relative risks and the prevalence of risk factors, we estimated local population attributable risks. Measurements and Main Results: The mean prevalence of CAO was 11.2% in men and 8.6% in women. The mean population attributable risk for smoking was 5.1% in men and 2.2% in women. The next most influential risk factors were poor education levels, working in a dusty job for ≥10 years, low body mass index, and a history of tuberculosis. The risk of CAO attributable to the different risk factors varied across sites. Conclusions: Although smoking remains the most important risk factor for CAO, in some areas, poor education, low body mass index, and passive smoking are of greater importance. Dusty occupations and tuberculosis are important risk factors at some sites.
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