Smoking reduction and biomarkers in two longitudinal studies.


AIMS To measure reduction in exposure to smoke in two population-based studies of self-reported smoking reduction not using nicotine replacement. DESIGN Cross-sectional analyses of biomarkers and smoking. SETTING Data from two time-points in the Copenhagen City Heart Study (CCHS), 1981/83 and 1991/94, and the Copenhagen Male Study (CMS) in 1976 and 1985… (More)