Prevalence of persistent cough and phlegm in young adults in relation to long-term ambient sulfur oxide exposure

摘要: In early 1976, a survey of persistent cough and phlegm (PCP) prevalence was conducted in 5,623 young adults 4 Utah communities. Over the previous 5 years, community-specific mean sulfur dioxide levels had been 11, 18, 36, 115 micrograms/m3. Corresponding suspended sulfate 5, 7, 8, 14 No intercommunity exposure gradient total particulates or nitrates observed. nonsmoking mothers, PCP 4.2% high-exposure community approximately 2.0% all other smoking 21.8% 15.0% elsewhere. fathers, 8.0% averaged 3.0% less strongly associated with ambient oxide exposure. Intercommunity differences were significant at alpha = 0.05. A categorical logistic regression model, testing simultaneously for effects several covariates on prevalence, yielded similar results. The results this to those 1970 surveys. These disclose an association exposure, stronger mothers than nonsmokers ex-smokers smokers, 1976.