Table 3.

Logistic regression results using FTND and WI-PREPARE total scores as predictors, cross-validation analysis

	FTND				WI-PREPARE
Outcome	b (OR)	Wald	p value	Nagelkerke R2	b (OR)	Wald	p value	Nagelkerke R2
1 week postquit abstinence	−.26 (0.77)	45.72	<.001	.094	−.35 (0.71)	73.75	<.001	.160
8 weeks postquit abstinence	−.22 (0.80)	32.97	<.001	.068	−.32 (0.73)	61.77	<.001	.133
6 months postquit abstinence	−.14 (0.87)	9.36	.002	.023	−.15 (0.86)	11.46	.001	.028

Note. FTND, Fagerström Test for Nicotine Dependence; WI-PREPARE, Wisconsin Predicting Patients’ Relapse. Odds ratio (OR) indicates the change in likelihood of abstinence for each unit of change in the independent variable. The ORs for the FTND and the WI-PREPARE are not directly comparable.