Prevalence of heavy smokers in US decreases
Tuesday, March 15, 2011 - 17:30
in Health & Medicine
From 1965 to 2007, the population prevalence of persons who smoked 20 or more cigarettes per day declined significantly, and there was also a decrease in the prevalence of smoking 10 or more cigarettes a day, with these declines greater in California than in the rest of the US, according to a new study.