Post-Cessation Weight Gain among Smokers with Depression Predicts Smoking Relapse.

Weight gain (WG) is one of the most widespread consequences of smoking cessation, although there is a great variability of post-cessation weight changes among smokers. Its approach is critical because it depicts an important barrier to trying to quit smoking and because it has been considered as a long-term predictor of relapse. Notwithstanding, little is known about post-cessation WG specifically among depressed smokers. The current study sought to: (1) describe the WG at posttreatment and follow-ups in smokers with depression, (2) examine the predictors of posttreatment WG, and (3) analyze whether post-cessation WG predicts smoking relapse at 6-month follow-up. The sample was comprised of 125 smokers with depression who achieved tobacco abstinence at posttreatment following a psychological smoking cessation intervention. Smoking abstinence was biochemically verified through carbon monoxide and urine cotinine. Multiple linear and hierarchical logistic regressions were conducted to examine predictors of WG at posttreatment and tobacco relapse at 6-month follow-up, respectively. Abstinent participants gained an average of 3.55 kg at 6-month follow-up compared to 1.49 kg among participants who relapsed. Greater nicotine dependence ( = .372, = .001) and diastolic pressure at baseline ( = .252, = .021) predicted higher WG at end of treatment. WG at posttreatment increased the likelihood of relapse 6 months later ( = .303,  = 1.354; 95% CI [1.006, 1.822]). Weight concerns, disordered eating, and BMI were not recorded, and they could be related to the present findings. These results suggest that individuals with depression during treatment for smoking cessation should be regularly screened and offered treatment to prevent WG.