A second look at the effects of supportive follow-up on smoking cessation.

In 1982 a report in CMAJ (1982; 126: 127-129) indicated that the addition of supportive follow-up appointments in a family practice increased the 6-month cigarette abstinence rate from 12% to 23%. We reanalysed the data by means of recognized standards for treatment success and found little evidence that the treatment had any reliable effect on attempts to quit that lasted at least 3 months: 8.5% and 4.8% of the groups with and without supportive follow-up respectively abstained for more than 3 months. We discuss a problem of the experimental design (longer evaluative follow-up for the control group than for the treatment group) and cost-benefit issues.