TABLE 2.

Trends in Number of Total and Main Partners Among MSM—NHBS, 21 Cities, United States, 2008–2014

	No. of Total Partners
	2008			2011			2014			Overall (N = 28061)
	n	Adj. Mean	95% CI	n	Adj. Mean	95% CI	n	Adj. Mean	95% CI	Estimated Round Mean Change*†	95% CI	P	Inter.‡ P
Age (yrs)													0.02
18–24	2069	6.4	6.1 to 6.7	2347	6.7	6.4 to 7.0	1952	7.3	7.0 to 7.7	0.60	0.31 to 0.88	<0.01
25–29	1710	7.2	6.8 to 7.5	1746	7.1	6.8 to 7.5	2094	8.1	7.7 to 8.4	0.52	0.18 to 0.86	<0.01
30–39	2561	7.4	7.1 to 7.7	2182	7.6	7.3 to 8.0	2470	8.2	7.9 to 8.5	0.43	0.14 to 0.73	<0.01
≥40	2907	7.2	6.9 to 7.5	2954	7.2	6.9 to 7.5	3069	7.3	7.0 to 7.6	0.01	−0.29 to 0.31	0.95
Race/ethnicity													0.01
Black/African American	2188	6.0	5.7 to 6.3	2485	6.0	5.7 to 6.3	2652	6.1	5.8 to 6.4	0.02	−0.24 to 0.27	0.90
Hispanic/Latino∥	2232	6.9	6.6 to 7.3	2407	7.0	6.7 to 7.4	2523	7.4	7.1 to 7.7	0.17	−0.14 to 0.49	0.29
White	4024	7.8	7.6 to 8.1	3665	8.0	7.7 to 8.3	3668	9.1	8.8 to 9.4	0.67	0.38 to 0.96	<0.01
Other¶	803	6.7	6.2 to 7.3	672	7.0	6.4 to 7.7	742	7.7	7.1 to 8.3	0.42	−0.10 to 0.94	0.11
Self-reported HIV status													0.22
HIV-negative	7044	6.8	6.6 to 7.0	7114	7.1	6.9 to 7.3	7381	7.5	7.3 to 7.7	0.36	0.18 to 0.54	<0.01
HIV-positive	1101	8.7	8.2 to 9.2	1239	8.5	8.1 to 9.0	1581	9.6	9.1 to 10.0	0.54	0.03 to 1.04	0.04
Unknown	1102	6.5	6.1 to 7.0	876	6.1	5.7 to 6.5	623	6.5	6.0 to 7.1	0.03	−0.42 to 0.47	0.90
Total	9247	7.1	6.9 to 7.2	9229	7.2	7.0 to 7.4	9585	7.7	7.5 to 7.9	0.35	0.18 to 0.52	<0.01
	No. of Main§ Partners
	2008			2011			2014			Overall (N = 28053)
	n	Adj. Mean	95% CI	n	Adj. Mean	95% CI	n	Adj. Mean	95% CI	Estimated Round Mean Change*†	95% CI	P	Inter.‡P
Age (yrs)													0.03
18–24	2069	1.3	1.3 to 1.4	2347	1.3	1.3 to 1.4	1950	1.2	1.2 to 1.3	−0.05	−0.09 to −0.01	0.02
25–29	1709	1.1	1.0 to 1.2	1746	1.1	1.0 to 1.1	2093	1.1	1.1 to 1.2	0.02	−0.02 to 0.06	0.45
30–39	2561	0.9	0.9 to 1.0	2181	1.0	0.9, 1.0	2470	0.9	0.9 to 1.0	0.01	−0.02, 0.04	0.57
≥40	2907	0.8	0.7 to 0.8	2951	0.8	0.7 to 0.8	3069	0.7	0.7 to 0.8	−0.04	−0.07 to −0.01	0.02
Race/ethnicity													0.20
Black/African American	2187	1.0	1.0 to 1.1	2484	1.1	1.0 to 1.1	2651	1.0	0.9 to 1.0	−0.03	−0.07 to 0.01	0.14
Hispanic/Latino∥	2232	1.0	1.0 to 1.1	2406	1.0	1.0 to 1.1	2523	0.9	0.9 to 1.0	−0.04	−0.08 to −0.01	0.01
White	4024	1.0	1.0 to 1.0	3663	1.0	0.9 to 1.0	3667	1.0	0.9 to 1.0	0.00	−0.03 to 0.03	0.95
Other¶	803	1.0	0.9 to 1.0	672	1.0	0.9 to 1.1	741	1.0	0.9 to 1.1	0.01	−0.05 to 0.07	0.69
Self-reported HIV status													<0.01
HIV-negative	7043	1.0	1.0 to 1.1	7112	1.0	1.0 to 1.0	7379	1.0	0.9 to 1.0	−0.03	−0.05 to −0.01	<0.01
HIV-positive	1101	1.0	0.9 to 1.0	1239	1.1	1.0 to 1.1	1581	1.1	1.1 to 1.2	0.07	0.02 to 0.11	<0.01
Unknown	1102	0.9	0.8 to 1.0	874	0.8	0.8 to 0.9	622	0.8	0.8 to 0.9	−0.02	−0.09 to 0.04	0.47
Total	9246	1.0	1.0 to 1.0	9225	1.0	1.0 to 1.0	9582	1.0	1.0 to 1.0	−0.02	−0.04 to 0.00	0.05

^*Estimated round mean change = estimated 3-year mean change outcome.

^†Adjusted for age, race, HIV status, and city and accounted for clustering by recruitment event.

^‡Interaction P value.

^§Main partners refer to “men with whom the participant has had sex and feels committed to above anyone else.”

^∥Hispanics/Latinos can be of any race.

^¶Other races include American Indian, Alaska Native, Asian, Native Hawaiian, other Pacific Islander, and mixed race.