GPT and depressive symptom measurement: At baseline, the age, sex, average cigarette consumption, smoking duration, Fagerström test for nicotine dependence scores, body mass index, HbA1c, fasting glucose, alanine aminotransferase, estimated glomerular filtration rate; and the prevalence of hypertension, dyslipidemia, being physically active, depression, and sleep disturbance were comparable either between the FIT2 and the usual care participants in the intention-to-treat analysis (Table S1) or between the post-program quitters and the controls in the time-varying analysis (Table S2).