Table 2.

Logistic regression models predicting 12-month smoking cessation outcome by groups of engagement trajectories and other covariates^a.

Arm and covariate		Odds ratio	95% CI	P value
WebQuit
	5-week users	1.57	1.13-2.17	.007
	52-week users	2.24	1.45-3.43	<.001
	Half a pack or more	0.58	0.41-0.82	.002
	Commitment	1.69	1.37-2.10	<.001
	Panicb	0.75	0.55-1.01	.06
Smokefree
	4-week users	1.00	0.73-1.37	.99
	5-week users	1.48	1.05-2.07	.02
	High school or less	0.69	0.50-0.94	.02
	Smoking >10 years	0.76	0.55-1.06	.10
	Smokes within 5 minutes of waking	0.75	0.57-0.99	.05
	Commitment	1.71	1.41-2.07	<.001
	Partner smokes	0.62	0.47-0.84	.001

^aReference group: 1-week users. Only significant predictors have been included in this table for ease of reading.

^bRefers to whether participants screened positive for panic disorder.