Respiratory Effects of Non-Tobacco Cigarettes: A Longitudinal Study in General Population

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Abstract
Data from four consecutive surveys of Tucson longitudinal study of airways obstructive disease were used to examine the relation of respiratory symptoms and pulmonary function to non-tobacco cigarette smoking. The surveys were conducted over a six-year period and provided data on 1802 subjects 15–60 years of age, with a total of 5659 individual questionnaires. Estimated odds ratio (OR) of current non-tobacco smoking for chronic cough was 1.73, for chronic phlegm: 1.53, and for wheeze: 2.01 (p1, Vmax50 and their ratios with FVC) was found a year or more after current non-tobacco smoking was reported. Although the average consumption of non-tobacco cigarettes, believed to be marijuana smoking, was less than one per day, significant effects were still detectable in both pulmonary function and respiratory symptoms.

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