Table 4.

Logistic regression analysis for factors associated with syphilis among male patients attending an STI clinic in Puerto Rico, 2009–2010.

Variable	PORCrude* (95% CI)	PORAdjusted† (95% CI)
Age group
<45 years	1.0	1.0
≥45 years	3.5 (1.7, 6.4)	4.0 (1.9, 8.3)
MSM
Yes	2.2 (1.2, 4.1)	2.5 (1.3, 4.9)
No	1.0	1.0
HIV
Yes	2.2 (1.1, 4.6)	1.4 (0.6, 3.2)
No	1.0	1.0

^*Model 1: Crude model,

^†Model 2: Multivariate analysis