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Abstract
Studies were carried out to examine the relationships between air pollution, as indexed by benzo[a]pyrene, and pulmonary cancer, comparing urban with rural, migrant with nonmigrant, and smoking with nonsmoking populations.
Epidemiologic studies of effects of solid fuel and cigarettes in 19 countries and of benzo[a]pyrene levels and cigarettes in 48 contiguous states in the United States were carried out using multiple regression techniques to assess the relation between these pollutants and the incidence of pulmonary cancer in these populations.
An increase of 1μg of benzo[a]pyrene per 1,000 cu m of air as a pollution index was related to a 5% increase in the pulmonary cancer death rate. A reduction of 60% in urban air pollution might be expected to reduce the deaths from pulmonary cancer by 20% in all smoking categories.
