Long-term effects of a controlled smoking program: A 2 1/2 year follow-up

A 2 1/2 year follow-up was conducted on 48 subjects who had participated in acontrolled smoking program. Although some relapse from posttest smoking levels was observed, subjects were still smoking less than at pretest on all dependent variables. Nine percent of the subjects became totally abstinent between posttest and follow-up and an additional 9-36% of participants showed further reductions on measures of nicotine content, number of cigarettes, percentage of the cigarette smoked, and carbon monoxide levels. Consistent with earlier findings, there were no differences between subjects assigned to feedback versus no feedback conditions.