Table 3.

Predictors of smoking status from end of treatment to 12-month follow-up determined by generalized estimating equation (GEE) logistic regression with available data.

	Odds Ratio	95% OR	P
Baseline variables
Age	1.02	0.98–1.07	0.251
Gender
Female	1.37	0.48–3.89	0.552
Male	Ref
Treatment
Nicotine	0.81	0.31–2.12	0.672
Placebo	Ref
Treatment center
Center 4	2.36	0.49	0.285
Center 3	3.22	0.81	0.098
Center 2	1.49	0.46	0.511
Center 1	Ref
Water pipe smoking
Never	1.32	0.24–7.28	0.746
Previous	0.63	0.05–7.95	0.724
Current	Ref
Successful quit attempts
No	1.29	0.35–4.67	0.701
Yes	Ref
Fagerstrom test for nicotine dependence	0.86	0.65–1.13	0.284
Motivation (how motivated are you to quit)	0.92	0.59–1.42	0.695
Confidence (how confident are you that you can quit smoking)	1.27	1.03–1.58	0.026
Self-efficacy positive affect/social situation	1.06	0.89–1.27	0.507
Self-efficacy/negative affect situations	0.92	0.76–1.12	0.408
Self-efficacy/habitual/craving situation	1.02	0.85–1.22	0.851
Time-varying variables
Social support score	1.00	0.96–1.04	0.928
Depression score	1.00	0.96–1.03	0.790
Total withdrawal symptoms score	0.97	0.96–0.99	0.005
Subject perception of treatment allocation
Nicotine	Ref
Placebo	0.51	0.19–1.37	0.182