Table 1.

Individual-Level and Partnership-Level Characteristics of Enrolled Cohort and Analytic Sample in a Study of Black and White Men Who Have Sex with Men, Atlanta, 2010–2014

Characteristic	Enrolled Cohort		Analytic Sample
Individual	N = 560		N = 469
Age (n, %)
18–19	40	7.1	32	6.8
20–24	189	33.8	150	32.0
25–29	165	29.4	140	29.9
30–39	166	29.6	147	31.3
Race (n, %)
Black	257	45.9	205	43.7
White	303	54.1	264	56.3
Sexual Partners in Past 6 Months (mean, standard deviation, median)
Total Partners		5.7, 8.3, 5		5.8, 8.9, 5
Condomless Partners		1.9, 3.4, 1		1.8, 3.5, 1
Partnership	N = 1758		N = 1397
Partnership Type (n, %)
Main	267	15.3	253	18.1
Casual	533	30.5	494	35.4
One-Time	945	54.2	650	46.5
Racial Composition (n, %)
Black–Black	557	39.6	449	39.0
Black–White	95	6.8	73	6.4
White–White	754	53.6	628	54.6
Age Homophily (mean, standard deviation)
Absolute Difference in Years		8.1, 1.9		8.1, 1.7
Perceived Concordant HIV Status (n, %)
Concordant	965	57.9	814	60.6
Discordant/Unknown	702	42.1	530	39.4
Coital Frequency in Past 6 Months (mean, standard deviation, median)
Total Frequency		12.6, 18.4, 4		12.7, 18.5, 4
Partnership Agreement about Outside Sex (n, %)
No Agreement	565	71.6	527	71.6
No Outside Sex	112	14.2	103	14.0
Outside Sex with Conditions	43	5.45	40	5.4
Outside Sex without Conditions	69	8.8	66	9.0

The analytic sample includes only men with same-sex partnerships, no missingness in report of baseline and 6-month degree, and no unknown responses for 6-month degree.