TABLE 2.

Comparing relationship characteristic differences in HIV-positive and discordant gay male couples who did not use substances with sex within the relationship to those with one or both partners who did

	Marijuana		Amyl nitrates	EDM	Party drugsa
Sample size: dyads	By one partner (N = 11)	By both partners (N = 25)	By one partner (N = 9)	By one partner (N = 16)	By both partners (N = 5)
Between couple-level characteristic	RRR (95 % CI)	RRR (95 % CI)	RRR (95 % CI)	RRR (95 % CI)	RRR (95 % CI)
Investment model
Relationship satisfaction				3.25 (1.22–8.66)*
Investment size	0.30 (0.11–0.81)*	0.35 (0.13–0.90)*		0.23 (0.07–0.79)*
Trust scale
Dependability			0.22 (0.05–0.96)*		0.01 (0.00–0.42)*
Communication patterns scale
Mutual constructive		0.63 (0.40–0.98)*			0.48 (0.23–0.99)*

Findings in this table were produced from couple-level multinomial logistic regression analyses which controlled for relationship length

EDM erectile dysfunction medications

*p < 0.05

^aRepresents ecstasy, ketamine, GHB, cocaine, and methamphetamine