Table 2.

Hurdle model predicting CAS with Casual Partners Full Sample (n = 65,707)

	Any CAS with Casual Partners (Binomial)		Frequency of CAS with Casual Partners (Count)
	Odds Ratio	95% CI	Rate Ratio	95% CI
Age	0.986**	(0.985, 0.988)	1.001	(0.999, 1.003)
Race/Ethnicity (ref = White)
African-American	0.90**	(0.85, 0.96)	0.72**	(0.67, 0.77)
Asian	0.64**	(0.60, 0.70)	0.64**	(0.58, 0.72)
Latino	0.91**	(0.87, 0.96)	0.81**	(0.77, 0.86)
Other	0.98	(0.92, 1.04)	1.03	(0.97, 1.10)
Region (ref = Northeast)
Midwest	1.19**	(1.12, 1.25)	1.00	(0.94, 1.06)
South	1.19**	(1.13, 1.24)	1.01	(0.95, 1.06)
West	1.19**	(1.13, 1.25)	1.07*	(1.01, 1.13)
PrEP, HIV (ref = Negative/Unknown, without PrEP)
HIV positive	1.90**	(1.81, 1.99)	1.75**	(1.68, 1.84)
Current PrEP prescription	2.86**	(2.72, 3.03)	1.84**	(1.76, 1.93)
Sexual Orientation (ref = Gay)
Bisexual	1.06*	(1.01, 1.13)	1.09**	(1.02, 1.16)
Other	0.79**	(0.70, 0.89)	1.12	(0.98, 1.27)
Relationship Status (ref = Single)
Monogamous	0.31**	(0.29, 0.34)	1.63**	(1.46, 1.83)
Monogamish	0.67**	(0.61, 0.74)	0.77**	(0.67, 0.89)
Open	1.22**	(1.14, 1.31)	0.99	(0.91, 1.07)
Substance Use (ref no MJ, no CD)
MJ no CD	1.48**	(1.34, 1.63)	1.07	(0.96, 1.19)
CD no MJ	3.63**	(2.91, 4.51)	2.32**	(2.02, 2.64)
MJ and CD	3.35**	(2.92, 3.85)	2.05**	(1.86, 2.28)
Interactions
Monogamous*MJ no CD	0.91	(0.81, 1.04)	1.03	(0.86, 1.23)
Monogamous*CD no MJ	0.48**	(0.36, 0.65)	0.51**	(0.37, 0.70)
Monogamous*MJ & CD	0.66**	(0.55, 0.80)	0.55**	(0.45, 0.68)
Monogamish*MJ no CD	0.77**	(0.66, 0.91)	1.06	(0.84, 1.33)
Monogamish*CD no MJ	0.73	(0.52, 1.00)	0.77	(0.59, 1.00)
Monogamish*MJ & CD	0.73**	(0.58, 0.91)	0.94	(0.76, 1.17)
Open*MJ no CD	0.79**	(0.70, 0.88)	1.04	(0.92, 1.18)
Open*CD no MJ	0.83	(0.64, 1.07)	0.94	(0.81, 1.09)
Open*MJ & CD	0.79**	(0.67, 0.92)	0.99	(0.88, 1.11)

^*p ≤ .05

^**p ≤ .01

NOTE: MJ = Marijuana; CD = Club Drug; CAS = Condomless anal sex