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. 2018 Sep 14;67(36):1007–1011. doi: 10.15585/mmwr.mm6736a3

TABLE 1. Unadjusted weighted prevalence of sexual risk behaviors among sexual minority youths by identity- and behavior-based subgroups—National Youth Risk Behavior Survey, United States, 2015–2017.

Sexual risk behavior Sexual identity 
% (95% CI)
Sex of sexual contacts 
% (95% CI)
Gay or lesbian Bisexual Not sure Heterosexual Same sex only Both sexes Opposite sex only
Females
Ever had sexual intercourse
48.4 (41.5–55.4)
51.4 (47.0–55.8)
26.9 (22.3–32.0)
37.3 (34.4–40.2)
66.2 (57.8–73.7)
72.6 (67.4–77.3)
77.7 (74.9–80.3)
Had first sexual intercourse before age 13 years*
11.1 (5.0–23.1)
11.2 (8.6–14.5)
12.0 (7.4–18.9)
3.8 (3.1–4.8)
15.2 (8.1–26.7)
13.2 (10.5–16.4)
3.7 (3.0–4.6)
Had sexual intercourse with ≥4 persons*,†
25.2 (15.6–37.9)
30.7 (26.5–35.2)
29.4 (18.7–43.0)
19.5 (18.0–21.1)
19.6 (11.9–30.6)
43.9 (38.0–50.0)
18.1 (16.5–19.8)
Currently sexually active*
69.3 (56.5–79.6)
71.4 (66.7–75.7)
68.4 (58.1–77.1)
77.7 (75.9–79.4)
65.7 (54.8–75.2)
77.5 (73.3–81.2)
76.3 (74.6–78.0)
Did not use condom during last sexual intercourse*
82.5 (68.6–91.0)
51.7 (46.6–56.7)
42.5 (31.3–54.5)
44.6 (42.3–47.0)

56.5 (51.9–61.1)
43.6 (41.4–45.9)
Did not use any method to prevent pregnancy during last sexual intercourse*,**
68.5 (56.2–78.7)
21.3 (17.5–25.6)
15.4 (9.8–23.5)
13.3 (11.5–15.4)

21.4 (18.0–25.3)
13.3 (11.5–15.4)
Drank alcohol or used drugs before last sexual intercourse*
18.5 (9.6–32.4)
20.4 (17.4–23.9)
31.2 (21.1–43.4)
15.1 (13.6–16.7)
17.8 (10.0–29.6)
28.2 (23.9–32.9)
14.3 (12.9–15.9)
Never been tested for HIV*,††
80.3 (68.8–88.3)
73.3 (68.5–77.5)
84.1 (76.8–89.5)
79.8 (77.6–81.7)
77.6 (65.9–86.1)
69.1 (64.4–73.4)
80.5 (78.4–82.4)
Males
Ever had sexual intercourse
47.8 (39.3–56.3)
42.7 (35.3–50.5)
33.9 (27.5–41.0)
42.5 (40.0–44.9)
83.3 (75.3–89.1)
77.3 (68.9–84.0)
78.9 (76.3–81.2)
Had first sexual intercourse before age 13 years*
21.4 (11.3–36.8)
18.1 (10.4–29.6)
29.7 (20.6–40.6)
11.3 (9.9–13.0)
26.1 (15.1–41.1)
28.1 (19.6–38.6)
11.1 (9.6–12.7)
Had sexual intercourse with ≥4 persons*,†
28.8 (20.2–39.2)
28.3 (19.0–39.8)
46.1 (33.1–59.7)
30.3 (27.9–32.8)
25.0 (17.3–34.7)
43.0 (33.6–52.9)
30.2 (27.9–32.7)
Currently sexually active*
67.1 (56.1–76.5)
60.6 (49.5–70.7)
72.4 (61.6–81.1)
70.4 (68.5–72.3)
66.2 (54.1–76.4)
66.1 (56.1–74.8)
70.5 (68.5–72.3)
Did not use condom during last sexual intercourse*
54.4 (37.8–70.0)
43.7 (34.3–53.6)
45.1 (32.6–58.1)
35.1 (32.9–37.3)
58.4 (46.0–69.8)
46.1 (35.9–56.6)
35.1 (32.9–37.4)
Did not use any method to prevent pregnancy during last sexual intercourse*,**
48.8 (33.0–64.7)
18.3 (11.3–28.4)
25.1 (14.9–39.0)
10.8 (9.6–12.2)

21.6 (14.6–30.6)
10.8 (9.4–12.4)
Drank alcohol or used drugs before last sexual intercourse*
15.8 (8.4–27.9)
19.9 (11.9–31.3)
36.5 (25.2–49.5)
20.5 (18.7–22.4)
13.5 (7.1–24.2)
30.3 (22.2–39.9)
20.6 (18.8–22.5)
Never been tested for HIV*,†† 69.7 (53.9–81.9) 84.4 (74.6–90.9) 82.1 (71.6–89.2) 87.0 (85.2–88.7) 78.0 (63.9–87.7) 82.4 (75.8–87.5) 87.0 (85.1–88.8)

Abbreviations: AIDS = acquired immunodeficiency virus; CI = confidence interval; HIV = human immunodeficiency virus.

*Analysis conducted among only students who ever had sexual intercourse. Analyses were not conducted for no condom use among female students with only same-sex sexual contact or for no pregnancy prevention use among male or female students with only same-sex sexual contact. In addition, students who had no sexual contact are excluded from the analyses by sex of sexual contact.

During their life.

§ Had sexual intercourse with at least one person during the 3 months before the survey.

Question asked about condom use by “you or your partner.”

** Question asked about method used for pregnancy prevention by “you or your partner.”

†† Question asked, “Have you ever been tested for HIV, the virus that causes AIDS? (Do not count tests done if you donated blood.)”