Table 4.

Multivariate Models Examining the Contribution of Measures of Motivation to Quit Smoking in Predicting Eventual Cessation^*

Motivation Variable	Model 1†χ 2	p	Model 2‡χ 2	p	Model 3§χ 2	p	Model 4∥χ 2	p	Model 5¶χ 2	p
Stage	—	—	176.2	<.001	—	—	—	.92	238.3	.71
Likely	—	—	255.9	<.001	—	>.001	—	<.001	—	—
Want	—	—	195.0	<.001	—	—	—	.44	256.5	.31
Confidence	—	—	207.7	<.001	—	.04	—	.05	238.3	.05
Motivation	—	—	218.0	<.001	—	—	—	.10	258.4	.09
Overall	167.2	—	—	—	189.3	—	246.3	—	—	—

^*χ² for overall model and p values for significance of variable in model are presented

^†Model 1: covariates only (see METHODS)

^‡Model 2: motivation variables separately in model with covariates

^§Model 3: stepwise regression of motivation measures and covariates

^∥Model 4: motivation variables added together in a single model with covariates

^¶Model 5: motivation variables added separately to a model including Likely