Why do those who request smoking treatment fail to attend the first appointment?

As part of a larger trial of pharmacological and counseling interventions for light smokers, we performed a telephone-screening interview followed by a scheduled time for an in-person eligibility appointment. Of the 407 who screened positive and expressed interest in participation, 202 failed to attend the first scheduled appointment. This article examines person, study, and study-site characteristics that differentiated those who did follow through from those who did not. The study also examined the self-reported quit rates of both groups 12 weeks later, the time of the study termination.