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Supplementary Material for: A Systematic Review of the Association between Pulmonary Tuberculosis and the Development of Chronic Airflow Obstruction in Adults

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posted on 2013-05-03, 00:00 authored by Allwood B.W., Myer L., Bateman E.D.
Background: Chronic obstructive pulmonary disease (COPD) is a major public health concern, accounting for 3 million deaths annually, 90% of which occur in low- and middle-income countries. Pulmonary tuberculosis (PTB) as a contributory factor in the aetiology of COPD is under debate, with most epidemiologic evidence suggesting a positive association. Objectives: To compile a systematic review of evidence for an association between PTB and the development of chronic airflow obstruction (CAO). Methods: We performed a systematic review of original English-language, peer-reviewed literature using the PubMed/MEDLINE database. CAO was defined by spirometry [FEV1:FVC ratio <0.70 or Results: Nineteen studies (1 case series, 3 case-control studies, 4 cohort studies, 8 single-centre cross-sectional studies and 3 multi-centre cross-sectional studies) met the eligibility criteria. All but 2 reported a positive association between PTB and CAO. Three of 4 large population-based surveys (n = 4,291-8,066) confirmed a significant association between PTB and CAO (OR 1.37 - 2.94). A formal meta-analysis was not possible owing to marked heterogeneity between studies. Conclusions: This systematic review confirms evidence for a positive association between a past history of tuberculosis and the presence of CAO. The association is independent of cigarette smoking. Causality is likely but cannot be assumed.

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