Table 3.

Multivariate Regression Analysis of Variables That Differed between Groups or Were Associated with 7-Day Abstinence at 30 Days

Whole Model Test
Model	−Log-likelihood	df	χ2	Prob > χ2
Difference	22.29	9	44.55	<0.0001
Full	141.9
Reduced	164.2
R2 (U)		0.1356
Observations (or sum weights)		459
Term	Estimate	SE	Prob > χ2	Odds Ratio
Constant	2.61	0.275	<0.0001
College education	−0.0724	0.161	0.6528	0.865
Married or living together	−0.0367	0.165	0.8245	0.929
Employed full time	−0.179	0.161	0.2665	0.699
European ancestry	0.329	0.210	0.1186	1.923
High confidence in success	0.694	0.162	<0.0001	4.01
High depression symptoms	−0.411	0.175	0.0193	0.440
High number of cigarettes per day	0.511	0.195	0.0087	2.78
High addiction level	−0.457	0.208	0.0284	0.401
Intervention group	0.489	0.184	0.0079	2.66

SE = standard error; Prob = probability.