Table 2. Number of condomless anal sex acts with male partners in the past 2 months regressed on personal and social characteristics (Step 1), substance use factors (Step 2), psychological risk factors (Step 3) and venues used to meet sex partners (Step 4) among men who have sex with men in Tijuana, Mexico (N = 197)^a.

	Step 1		Step 2		Step 3		Step 4
	beta	sr2	beta	sr2	beta	sr2	beta	sr2
Sexual orientation (gay vs other)	.047	.002	.070	.004	.052	.002	.083	.005
Age (in years)	-.036	.001	-.035	.001	-.077	.005	-.058	.003
Living arrangement (living with male spouse/steady partner vs other)	-.050	.002	-.047	.002	-.032	.001	-.023	.001
AUDIT-10b			.017	.000	-.062	.003	-.067	.004
Use of illicit drugsc (y/n)			.084	.006	.058	.003	.038	.001
Beck Depression					.208**	.033	.221**	.038
Sexual compulsivity					.197*	.029	.174*	.022
Internalized homophobia					-.077	.004	-.065	.003
Sought out sex partner(s) in public venued (y/n)							.182*	.028
Sought out sex partner(s) in commercial venue (e.g.,bathhouse/adult theater/ bar/nightclubd (y/n)							-.053	.002
Constant	.390**		.326*		.138		.073
R2	.006		.013		.110		.139
R2 change	.006		.007		.097***		.028*
F (df)	0.37 (3,193)		0.50 (5,191)		2.92** (8,188)		2.99**(10,186)

beta = standardized regression coefficient;

^‡ p < .10

*p < .05;

**p < .01;

***p < .001 (2-tailed tests)

^a Four cases missing data;

^bIn the past year;

^cIn past month;

^dIn the past 2 months

sr² = the proportion of variance explained in the dependent variable (DV) by a specific independent variable

R² = proportion of variance in the DV explained by the regression model

R² Δ = proportion of variance in the DV accounted for by the block of variables at that step in the regression