Table 2.

Analysis of Continuous Baseline Predictors of Cotinine Verified Quitting at Month 6

Baseline Predictors	Abstinent, mean (SD)	Smoker, mean (SD)	P*
Age	47.6 (10.9)	45.3 (10.5)	.05
Cigarettes per day	6.8 (3.3)	7.5 (3.0)	.04
Cotinine	155.6 (123.9)	256.9 (154.3)	<.0001
Years smoked	26.2 (12.3)	24.2 (11.8)	.14
Motivation to quit	9.0 (1.5)	9.0 (1.6)	.84
Confidence to quit	7.5 (2.3)	7.0 (2.6)	.03
Number of 24 h quit attempts in past year	3.3 (6.4)	3.2 (6.8)	.87
Days used alcohol in past month	3.9 (6.7)	4.9 (7.7)	.16
Body mass index	33.1 (8.8)	30.3 (7.9)	.005
Nicotine dependence†	−0.9 (1.0)	−0.9 (1.0)	.88
Self-efficacy to refrain from internal stimuli	15.6 (5.2)	15.3 (5.4)	.59
Self-efficacy to refrain from external stimuli	14.4 (6.1)	13.9 (6.2)	.46
Autonomous regulation	40.0 (2.7)	39.7 (3.6)	.39
Controlled regulation	23.5 (10.5)	20.7 (10.0)	.58
Depression	3.3 (2.4)	3.5 (2.6)	.39
Perceived stress	8.5 (2.1)	8.7 (2.0)	.44
Autonomous support‡	100.8 (4.1)	99.0 (7.2)	.001

^*t-test.

^†Derived from the summary score from the Nicotine Dependence Syndrome Scale.

^‡Derived from the average Health Care Climate Questionnaire score at the randomization, weeks 1, 8, and 26 visits.