Table 4.

Comparison and odds of having an open sexual agreement based on HIV-negative gay male couples’ use of substances with sex

	Type of sexual agreement
	Open agreement		Closed agreement(ref)
Sample size: 137 dyads	N = 62 dyads		N = 75 dyads
Substance use with sex	One or both partners used		One or both partners used
Within relationship	N	%	N	%	AOR	CI
Party drugsa	10	16	7	9	1.85	0.64 – 5.35
Marijuana	28	45	25	33	1.52	0.74 – 3.14
Alcohol	52	84	56	75	0.73	0.27 – 1.98
EDMb	19	31	6	8	5.19**	1.86 – 14.47
Amyl nitrates	18	29	7	9	4.03**	1.51 – 10.78
Sample size:56 dyads, 95 gay men	N = 84 gay men		N = 11 gay men
Outside of relationshipc	N	%	N	%	AOR	CI
Party drugsa	12	14	1	9	1.41	0.14 – 13.72
Marijuana	31	37	2	18	1.92	0.31 – 11.84
Alcohol	65	77	3	27	9.64**	1.80 – 51.57
EDMb	27	32	2	18	1.80	0.30 – 10.70
Amyl nitrates	34	40	5	45	0.82	0.17 – 3.95

Notes.

Findings in this table were produced from couple-level analyses. Logistic regression models for within the relationship controlled for engagement of unprotected anal intercourse with the main partner whereas the logistic regression models for outside the relationship controlled for unprotected anal intercourse with a casual MSM partner.

AOR adjusted odds ratio, CI confidence interval

^**p<.01

^aParty drugs include ecstasy, ketamine, GHB, cocaine, and methamphetamine.

^bEDM denotes Erectile Dysfunction Medication.

^cRates, percentages and adjusted odds ratios only included those who reported they had sex with a casual MSM partner within the prior three months to assessment.