Risk/benefit tradeoff of habitual physical activity and air pollution on chronic pulmonary obstructive disease: findings from a large prospective cohort study

BACKGROUND: ) exposure on COPD incidence in a prospective population-based cohort. METHODS: , PA, and COPD. Additive and multiplicative interactions were examined. RESULTS: exposure was found. Similar results were found for accelerometer-measured PA. CONCLUSIONS: pollution exposure.