Statistical Analysis
REGRESSION, SECONDARY
Descriptive statistics were calculated to compare the baseline status between the 2 groups. We conducted intention-to-treat and Russell Standard analyses for each group. All randomized participants were included in the denominator for calculating abstinence rates, with the exception of participants who were unavailable for follow-up for unavoidable reasons (ie, the participant died or moved to an untraceable address). Those who declined to be involved in subsequent data collection were counted as smokers.The primary and secondary abstinence outcomes were analyzed using logistic regression analysis of smoking status at each time point. The dependent variable was smoking status (with 0 indicating still smoking and 1 indicating abstinent). The independent variable was each intervention condition vs the control condition. Odds ratios (ORs) were used to measure the outcomes for the intervention group compared with the control group, and 95% CIs and We compared the change in nicotine dependence, nicotine withdrawal symptoms, and expired air carbon monoxide readings during the intervention and follow-up periods between the 2 groups using descriptive statistics and 2-sample A threshold of 2-sided 