Abstract
BACKGROUND: No study has assessed the impact of flavor capsule cigarettes (FCCs) on smoking cessation. Thus, the purpose of this exploratory study was to assess (1) the sociodemographic and smoking-related characteristics associated with using FCCs, and (2) the preliminary impact of FCCs on smoking cessation. METHODS: This study is a secondary data analysis of a single-arm study with 100 individuals living in Mexico who smoked and received a smoking cessation mHealth intervention and pharmacotherapy support. The primary outcomes were self-reported and biochemically verified 7-day smoking abstinence at Month 3. RESULTS: Just over one-third of participants (36%) used FCCs, with a preference for one capsule and menthol/mint flavor. Compared to participants who smoked non-FCCs, participants who smoked FCCs were (1) younger, (2) more likely to be women, and (3) more likely to smoke less than 10 cigarettes per day (CPD; all p's < 0.05). After controlling for all significant associations, age younger than 50 years old (AOR = 3.26, 95% CI 1.25-8.51) and being a woman (AOR = 3.62, 95% CI 1.41-9.35) were positively and independently associated with smoking FCCs. Treating those lost to follow-up as participants who continued smoking, 41.7% (15/36) of participants who smoked FCCs self-reported smoking abstinence at month 3 compared to 42.2% (27/64) of participants who smoked non-FCCs (p = 0.96). Furthermore, 33.3% (12/36) of participants who smoked FCCs were biochemically verified abstinent at Month 3 compared to 18.8% (12/64) of participants who smoked non-FCCs (p = 0.10). CONCLUSIONS: Younger age and being a woman were associated with using FCCs. Self-reported smoking abstinence at Month 3 was comparable between participants who smoke FCCs and non-FCCs. However, biochemically verified abstinent at Month 3 was higher among participants who smoke FCCs compared to participants who smoke non-FCCs, although the difference was not statistically significant. Prospective and adequately powered comparisons must be made between individuals who smoke FCCs and non-FCCs to effectively assess differences in smoking abstinence, and the reasons for these differences.