Changes in vaping behavior
EC users who were not abstinent from vaping were considered as treatment failures. Taking the whole cohort of subjects completing the study, reduction in vaping consumption was observed in 33.6% and 26.3% of the subjects at week 12 and week 24, respectively. Reduction in vaping consumption between the groups was significant (Vaping relapse was observed in 29.2% and 35.8% of the subjects at week 12 (V6) and week 24 (V7), respectively. Vaping relapse rate during the non-treatment phase was calculated by considering changes in behavior trajectories from V6 to V7 ( Additional file 