Table 2.

Hierarchical regression analysis of motivation to change

	Alcohol use			Illicit drug use			HIV risk behaviors
	β	t	ΔR2	β	t	ΔR2	β	t	ΔR2
Step 1			.04			.04			.03
• Gender	.07	.71		.11	1.05		.10	.84
• Age	.23	2.49*		.13	1.29		.12	.96
• Sexual orientation	−.05	−.50		.01	.08		−.06	−.48
• Ethnicity	.002	.03		.13	1.42		.08	.65
Step 2			.04			.06			.10*
• Current # days without shelter†	.03	.36		.09	.98		−.36	−3.04**
• Difficulty meeting needs	−.16	−1.76		.09	.91		.11	.92
• System experience	−.10	−1.13		−.18	−1.80		−.04	−.31
Step 3		34***				.08			.04
• Depression	.16	1.55		.10	.99		−.07	−.48
• Consequences of substance use	.15	1.55		.23	2.15*
• Consequences of sex†							.14	1.10
• Sexual abuse	−.33	3.55**		.01	.11		.11	.81
• Frequency of alcohol use†	.33	3.78***					.04	.34
• Frequency of illicit drug use				.05	.56		−.04	−.32
Final Model
F	5.28** *			2.02*			1.09
R square	.42			.18			.18
Adjusted R square	.34			.09			.01

^*p< .05

^**p<.01

^***p<.001

^†indicates log transformation before analyses