Table 2.

Univariate analysis of correlates of HIV infection among MSM in Tijuana, Mexico (n=191)^a

	HIV− (n=158)		HIV+ (n=33)		OR	p	95% CI
	n	%	n	%
Demographics
Age (per year increment)	29.0b	9.0c	32b	10c	1.03	0.10	0.99–1.07
Substance use
Ever used methamphetamines	40	25.3	14	42.4	2.17	0.05	1.00–4.73
Ever used amyl nitrate	23	14.6	9	27.3	2.19	0.08	0.90–5.29
Hazardous alcohol use	70	44.3	7	21.2	0.34	0.02	0.14–0.83
Sex-related variables, past 2 months
Alcohol before or during sex	71	44.9	5	15.2	0.23	0.01	0.08–0.67
Had casual sex	87	55.0	11	33.3	0.41	0.03	0.19–0.90
Had sex in a public venue	45	28.5	3	9.1	0.25	0.03	0.07–0.86
Unprotected receptive anal sex (per act increment)	2.0b	5.6c	5.2b	13.6c	1.04	0.05	1.00–1.09
HIV/STI related
Tested for HIV in the past year	69	43.7	9	27.3	0.48	0.09	0.21–1.11
Tested syphilis positive	8	5.1	6	18.2	4.17	0.01	1.34–12.96

^aSeeds (n=10) have been excluded from the analysis due to non-random sampling;

^bmean;

^cstandard deviation. OR: odds ratio; CI: confidence interval.