Cigarette Smoking, Chronic Bronchitis, and Emphysema

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Abstract
Of 150 patients with chronic bronchitis and/or diffuse obstructive pulmonary emphysema, 143 were cigarette smokers, most of them heavy smokers from an early age. Of the 60 who stopped smoking, 44 noted complete or almost complete relief from coughing. These 44 evidenced a lower mortality rate during the 20 years after the onset of their dyspnea than did the 84 who continued to smoke. The lungs of 125 persons who died after age 40 were graded for chronic bronchitis and the quantity of emphysema and black pigmentation. Emphysema and pigment were usually found in close proximity to each other. These three factors correlated well with each other and also with the cigarette smoking histories. The nature of the black pigment is unknown.

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