Among chronic smokers, FTND scores (Wald = 14.66, β = −0.14, P = 0.0001), time to first cigarette of the day (Wald = 11.66, β =−0.27, P = 0.0006) and cigarettes per day (Wald = 13.32, β = −0.03, P = 0.0003) each significantly predicted probability of smoking abstinence at week 12.To determine the strongest predictor of smoking abstinence among these three variables, FTND, time to first cigarette and cigarettes smoked per day were entered into a simultaneous logistic regression. Results indicated that FTND (Wald = 0.74, β = −0.05, P = 0.38) and time to first cigarette (Wald = 1.24, β = −0.13, P = 0.26) were no longer related to likelihood of smoking abstinence at week 12, whereas higher daily cigarette consumption at baseline (Wald = 4.24,β = −0.02, P = 0.04) continued to be associated with a lower probability of smoking abstinence at week 12.
