Chronic Bronchitis, Cigarette Smoking, and the Subsequent Onset of Depression and Anxiety: Results From a Prospective Population-Based Cohort Study

Abstract
Objective: The authors used data from a prospective, population-based cohort study to examine: (a) whether the presence of chronic bronchitis predicts the subsequent onset of depression or anxiety, and (b) if the incidence of depressed or anxious cases was different for smokers compared with nonsmokers.

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