Table 5.

Relationship Factors Associated with Unprotected Anal Sex with Outside Partner of Discordant or Unknown HIV Status in Past 3 Months

Parameter	Odds ratio	OR_LB	OR_UB	p Value
Among men in concordant negative relationships
Relationship length (years)	1.03	0.995	1.06	0.09
Open agreement	9.08	3.70	22.30	<0.01
Equality	0.98	0.95	0.9998	0.048
HIV-specific social support	0.91	0.88	0.94	<0.01
Among men in concordant positive relationships
Relationship length (years)	1.05	0.997	1.10	0.06
Open agreement	3.36	1.04	10.84	0.04
Sexual agreement investment	0.97	0.94	0.997	0.03
Among men in discordant relationships
Relationship length (years)	0.97	0.92	1.02	0.19
Open agreement	5.87	2.18	15.75	<0.01
HIV-positive (self)	2.51	1.33	4.74	<0.01
HIV-specific social support	0.91	0.88	0.94	<0.01

N=1132 men from 566 couples. Relationship length and agreement type were treated as control variables in the above models. OR_LB, lower bound of 95% confidence interval of odds ratio; OR_UB, upper bound of 95% confidence interval of odds ratio. Models were fitting using generalized estimating equations (GEE) clustering on couple ID with an exchangeable correlation structure to account for the nesting of individuals within couples.