Table 4.

Summary of Stepwise Regression Analyses for All Data

Study	Later Cocaine Abstinence	Variable	B	SE B	β
ALL DATA	Weeks 7 and 8
		Weeks 3&4 AB	.758	.107	.517**
		Weeks 3&4 AB	.727	.107	.495**
		Gender	−.745	.353	−.154*
	Percent Cocaine-Negative
		Weeks 3&4 AB	.102	.015	.511**
		Weeks 3&4 AB	.095	.015	.475**
		Week 3 composite craving	−.013	.006	−.152*
AMPRO	Weeks 7 and 8
		Weeks 3&4 AB	.661	.213	.409**
	Percent Cocaine-Negative
		Weeks 3&4 AB	.086	.031	.372**
DISULF	Weeks 7 and 8
		Weeks 3&4 AB	.865	.146	.537**
		Weeks 3&4 AB	.836	.143	.519**
		Gender	−.948	.441	−.191*
	Percent Cocaine-Negative
		Weeks 3&4 AB	.117	.019	.554**

^*p<.05,

^**p<.01

Note: For ALL DATA

R² =.267, for Weeks 7 and 8 Step 1, ΔR² =.023 for Step 2 (ps <.05)

R² =.262 for Percent Cocaine-Negative Step 1, ΔR² =.022 for Step 2 (ps <.05)

For DISULF

R² =.288, for Weeks 7 and 8 Step 1, ΔR² =.036 for Step 2 (ps <.05)