CHRONIC COUGH: ANALYSIS OF ETIOLOGIC FACTORS IN A SURVEY OF 1,274 MEN

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Abstract
Study of chronic cough was carried out in two separate groups of men, with geographic, residential and occupational differences between the two groups. These factors together with those of previous pulmonary infection, smoking habits and age were evaluated in relation to the incidence of chronic cough. Correlation was found between cigarette smoking and chronic cough. No direct correlation was seen with any of the other factors except age, and this was of importance chiefly in those who smoked cigarettes. It is suggested that, in view of this, certain factors commonly considered as related to the causation of chronic bronchitis may need reevaluation. Comparison between smokers and non-smokers would seem necessarily to be an integral part of such studies. The high incidence of chronic cough in the older age group of cigarette smokers, together with its duration, may well have relationship to structural changes in the lungs of such individuals.
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