Feasibility of recruiting young adults with low socioeconomic status for formative evaluation of a smoking cessation mobile intervention.

Introduction: Participant recruitment is critical to the success of smoking cessation trials. However, recruitment feasibility studies for inclusion and exclusion criteria commonly used in smoking cessation research remain scarce. We assessed the feasibility of recruiting potential research volunteers (PRVs) under two sets of inclusion criteria to inform eligibility requirements for a smoking cessation mobile intervention trial.

Methods: We invited PRVs nationwide to participate in qualitative evaluation of a smoking cessation mobile application. To be eligible under Criteria I, participants were aged 18-29 years, neither four-year college graduates nor enrollees, exclusive cigarette smokers, willing to quit within 30 days, and not using cessation aids. Criteria II expanded eligibility to those using cigarettes and non-combustible tobacco products (e.g. e-cigarettes) and willing to quit within 6 months. We calculated recruitment yields and associated costs.

Results: Of 10533 PRVs screened for eligibility, 48 were enrolled. Only 54 (0.5%) participants qualified under Criteria I and 164 (1.6%) under Criteria II. Age ineligibility was the top reason for exclusion (66.7%), whereas lifetime smoking, quit timeframe, and other tobacco product use contributed to ineligibility rates ranging from 46.5% to 65.3%. Enrolled participants were equally split by sex and roughly reflected the racial/ethnic composition of the United States. American Indians, who have the highest smoking prevalence, were <5% of enrolled participants. Recruitment costs averaged $106 per PRV.

Conclusions: Eligibility requirements used in cessation trials were restrictive for recruitment efforts. Relaxing inclusion criteria will reflect current tobacco use patterns and facilitate the timely completion of trials within budgetary thresholds.