Prevalence and Incidence of Chronic Lower Respiratory Diseases in Farmers: Systematic Review
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Abstract
This systematic review aimed to estimate prevalence and incidence of chronic lower respiratory diseases, including chronic obstructive pulmonary disease (COPD), airway obstruction, chronic bronchitis, and asthma among agricultural workers. The objective was to estimate the prevalence and incidence of these chronic lower respiratory diseases in farmers. The study conducted a comprehensive literature search from electronic databases including Thai Journals Online (ThaiJO), PubMed, CINAHL, SCOPUS and CENTRAL. Included studies were analyzed using meta-analysis with a random-effects model. The risk of bias was assessed using the JBI Critical Appraisal Checklist for Studies Reporting Prevalence Data. Out of 135 studies that met the inclusion criteria, 125 studies were included in the meta-analysis with a total sample size of 825,713 farmers. The overall prevalence of chronic lower respiratory diseases was as follows: COPD 7% (95% CI: 5-11%), airway obstruction 16% (95% CI: 12-22%), chronic bronchitis 8% (95% CI: 7-10%), and asthma 7% (95% CI: 6-8%). The overall incidence was 14% (95% CI: 9-20%) for COPD and 3% (95% CI: 1-9%) for asthma. The risk of bias assessment of the included studies generally indicated a low risk of bias. Additionally, most of the included studies were conducted in high-income countries (108 studies (80%))
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