Table 3 Multiple logistic regression analysis of predictors in baseline smokers for continuing smoking at 1-year follow-up

Predictor	Odds ratio (95% CI)	p Value
Cigarettes per day	0.96 (0.92 to 1.01)	0.07
Pack-years	1.03 (1.01 to 1.05)	0.01
FEV₁/FVC	1.11 (1.01 to 1.21)	0.03
Fagerström score	1.40 (1.17 to 1.50)	<0.01
Motivation score	0.72 (0.64 to 0.80)	<0.01
CT vs control	1.04 (0.82 to 1.31)	0.76
Gender	0.99 (0.76 to 1.26)	0.93
Age	0.97 (0.94 to 0.99)	0.03

Included in the model are 2388 continuous smokers and 324 recent quitters (only complete data).
FEV₁, forced expiratory volume in 1 s; FVC, forced vital capacity.