Table 5.

Quasi-Poisson regression model demonstrating latent class predicting HIV-risk behavior

	HIV-risk behavior Adj. RR	SE	95% CI	Wald statistic	Omnibus p-value
Syndemic Class
Class 1 (“No Syndemic Class”; n = 791; 84.4%)	ref			21.39***	<.001
Class 2 (“Alcohol Misuse and Polydrug Use Syndemic Class”; n = 72; 7.7%)	0.56	0.49	0.22, 1.45
Class 3 (“Polydrug Use and HIV Syndemic Class”; n = 23; 2.5%)	2.93*	0.53	1.05, 8.21
Class 4 (“Alcohol Misuse Class”; n = 51; 5.4%)	0.17***	0.47	0.07, 0.44
Demographic characteristics
Sexual orientation
Gay	ref			2.95	.23
Bisexual	1.48	0.40	0.67, 3.25
Other	2.71	0.62	0.80, 9.20
Age	1.01	0.02	0.98, 1.05	0.53	.47

Note Adj. RR adjusted rate ratio; SE standard error; CI confidence interval; ref reference group. All models adjusted for sexual orientation and age

^aHIV-risk behavior (i.e., number of times participants had sexual intercourse in the past 90 days, excluding oral events, that took place without condoms between serodiscordant or HIV status unknown partners when neither partner was protected by pre-exposure prophylaxis [for HIV-negative partners] or undetectable viral load [for HIV-positive partners]

^‡p < .10,

^*p < .05,

^**p < .01,

^***p < .001