Table 2.

Logistic regression models of abstinence at 12-week and 24-week follow-ups.

	12-Week follow-up		24-Week follow-up
Variable	OR (95% CI)	p value	OR (95% CI)	p value
Age	1.03 (1.01–1.05)	.009	1.03 (1.01–1.05)	.007
Sex	0.68 (0.46–1.02)	.065	0.79 (0.51–1.25)	.318
Nicotine dependencea	1.00 (0.96–1.05)	.864	0.98 (0.93–1.03)	.386
Treatment	1.59 (0.81–3.14)	.176	1.49 (0.75–2.96)	.251
Genotypeb
LL	1.00		1.00
SL	0.71 (0.35–1.43)	.335	0.46 (0.21–1.00)	.049
SS	0.89 (0.35–2.29)	.809	0.48 (0.15–1.50)	.206
Genotypeb × treatment
LL	1.00		1.00
SL	1.40 (0.56–3.50)	.473	1.44 (0.53–3.94)	.477
SS	1.39 (0.42–4.55)	.588	1.68 (0.42–6.74)	.464

^aNicotine dependence severity assessed by the Fagerström Test for Nicotine Dependence (Heatherton, Kozlowski, Frecker, & Fagerström, 1991).

^bReference group is LL.