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. Author manuscript; available in PMC: 2019 Dec 30.
Published in final edited form as: Sex Transm Dis. 2018 May;45(5):337–342. doi: 10.1097/OLQ.0000000000000762

TABLE 3.

Estimated Prevalence of Sociodemographic Characteristics and Behaviors Among Men Who Reported Ever Having Sex by MSM Behavior, NHANES, 1999 to 2014

MSM-Ever*
(n = 598)
MSM-Current
(n = 304)
MSM-Past
(n = 289)
Non-MSM
(n = 10,650)
P (MSM-Ever
vs. Non-MSM)
P (MSM-Current
vs. MSM-Past)

Prevalence, % (95% CI)   5.5 (4.8–6.1)   2.9 (2.3–3.4)   2.6 (2.2–3.0) 94.5 (93.9–95.2)
Age, median (IQR), y 39.0 (18.0) 37.9 (15.0) 44.0 (17.0) 39.0 (20.0) 0.05 <0.001
Age group, % (95% CI)   0.005 <0.001
 18–24 y   8.8 (6.5–11.9) 12.4 (8.2–18.4)§   4.1 (2.2–7.3)§ 14.0 (13.0–15.1)
 25–29 y 10.2 (7.7–13.3) 11.7 (8.0–16.7)   8.6 (5.6–13.0)§ 12.1 (11.4–12.8)
 30–39 y 31.2 (26.4–36.5) 35.8 (28.7–43.6) 26.5 (20.7–33.1) 24.4 (23.4–25.4)
 40–49 y 24.9 (20.8–29.6) 22.9 (17.0–30.1) 27.2 (21.2–34.1) 26.6 (25.5–27.7)
 50–59 y 24.8 (20.2–30.2) 17.1 (11.7–24.4) 33.7 (26.0–42.3) 22.9 (21.8–24.0)
Race/ethnicity, % (95% CI) 0.33 0.75
 White 72.3 (68.7–75.5) 71.4 (65.1–76.9) 74.0 (68.9–78.5) 68.9 (66.5–71.1)
 Black   9.9 (8.0–12.3) 10.3 (7.4–14.2)   9.1 (6.5–12.6) 10.6 (9.6–11.8)
 Hispanic 13.2 (10.9–15.9) 14.0 (10.3–18.6) 11.8 (9.0–15.5) 14.9 (13.1–16.9)
 Other   4.6 (3.0–7.1)§   4.3 (2.5–7.4)§   5.0 (2.8–8.7)§   5.6 (5.0–6.2)
Education, % (95% CI) <0.001 0.28
 ≤12 y 27.7 (23.3–32.5) 25.3 (19.6–32.1) 30.1 (23.9–37.2) 42.2 (40.4–44.1)
 >12 y 72.3 (67.5–76.7) 74.7 (67.9–80.4) 69.9 (62.8–76.1) 57.8 (55.9–59.6)
Marital status, % (95% CI) <0.001 <0.001
 Married 25.6 (21.4–30.3)   8.6 (5.3–13.8)§ 43.9 (36.6–51.5) 58.6 (57.0–60.1)
 Never married 41.5 (35.8–47.3) 56.7 (48.2–64.8) 25.2 (19.2–32.2) 21.5 (20.1–23.0)
 Living with partner 18.7 (14.5–23.7) 23.3 (16.5–31.8) 13.6 (9.5–19.1)   8.9 (8.2–9.7)
 Widowed/divorced/separated 14.3 (10.7–18.8) 11.4 (7.1–17.7)§ 17.4 (12.5–23.6) 11.0 (10.2–11.8)
Poverty, % (95% CI) 0.87 0.99
 At or above poverty 86.6 (83.4–89.3) 86.7 (81.7–90.5) 86.7 (82–90.3) 86.9 (85.7–88.0)
 Below poverty 13.4 (10.7–16.6) 13.3 (9.5–18.3) 13.3 (9.7–18.0) 13.1 (12.0–14.3)
Sexual orientation, % (95% CI) <0.001 <0.001
 Heterosexual 36.9 (30.3–44.1)   7.5 (4.3–12.7)§ 71.2 (62.3–78.8) 99.6 (99.5–99.8)
 Homosexual 44.8 (37.1–52.8) 70.4 (60.9–78.4) 14.9 (8.8–24.4)§   0.0 (0.0–0.1)
 Bisexual 18.3 (14.2–23.2) 22.1 (15.9–29.7) 13.8 (9.8–19.2)   0.3 (0.2–0.5)§
Total sex partners (lifetime)**
 Median (IQR) 17.0 (28.0) 20.0 (40.0) 12.4 (19.0)   8.0 (15.0) <0.001   0.003
 ≥10, % (95% CI) 69.8 (65.0–74.3) 75.6 (68.7–81.4) 63.3 (55.3–70.6) 43.1 (41.7–44.5) <0.001 0.02
Total sex partners (past 12 mo)**
 Median (IQR)   1.0 (2.0)   2.0 (4.0)   1.0 (1.0)   1.0 (0.0) <0.001 <0.001
 ≥2, % (95% CI) 42.4 (36.9–48.0) 62.4 (53.8–70.2) 20.0 (14.8–26.5) 18.8 (17.7–20.0) <0.001 <0.001
Age at first sex
 Median (IQR), y 16.0 (5.0) 17.0 (5.0) 16.0 (4.0) 17.0 (4.0) 0.05 0.05
 <15 y, % (95% CI) 28.3 (23.5–33.7) 26.2 (19.6–34.1) 30.9 (24.9–37.5) 17.3 (16.4–18.3) <0.001 0.32

In some cases, data were not available for all participants.

During survey cycles between 1999 and 2008, data were not publicly available on participants aged 18–19 years and were subsequently not included in the analysis

*

MSM-ever are participants who reported at least 1 lifetime male sexual partner (during the cycles between 1999 and 2008) or reported ever having any kind of sex with a man (during the cycles between 2009 and 2014).

MSM-current, a subgroup of MSM-ever, are MSM who reported having sex with at least 1 man within the past 12 months.

MSM-past, a subgroup of MSM-ever, are MSM who reported having sex with zero men within the past 12 months.

§

The relative SE is between 20% and 30% indicating the estimate may potentially be unreliable.

Sexual orientation was not collected during the 1999–2000 survey cycle.

The relative SE is greater than 30%, indicating that the estimate may potentially be unreliable.

**

Total sex partners were derived from the sum of (zero or more) reported male and female sex partners.

IQR indicates interquartile range.