Table 2 Sexual behaviors and health outcomes among MSM by nitrite inhalants use status (N = 1151)
Characteristics | n | Percentage, 95% CI | Nitrite inhalants users (n, %) | Non–users (n, %) | P value |
|---|---|---|---|---|---|
Sexual orientation | |||||
 Homosexual | 768 | 66.7 (64.0–69.2) | 167 (81.9) | 601 (63.5) | < 0.001 |
 Bisexual | 320 | 27.8 (25.5–30.2) | 35 (17.1) | 285 (30.1) |  |
 Uncertain | 63 | 5.5 (4.3–6.9) | 2 (1.0) | 61 (6.4) |  |
Age at first anal intercourse (years) | |||||
 < 18 | 241 | 20.9 (18.5–23.3) | 73 (35.8) | 168 (17.7) | < 0.001 |
 ≥ 18 | 910 | 79.1 (76.7–81.5) | 131 (64.2) | 779 (82.3) |  |
Seeking sex partners through gay applications in the past 6 months | |||||
 Yes | 774 | 67.2 (64.5–69.9) | 166 (81.4) | 608 (64.2) | < 0.001 |
 No | 377 | 32.8 (30.1–35.5) | 38 (18.6) | 339 (35.8) |  |
Preferring sexual role with males | |||||
 Insertive anal intercourse | 383 | 33.3 (30.7–36.1) | 33 (16.2) | 350 (36.9) | < 0.001 |
 Receptive anal intercourse | 265 | 23.0 (20.7–25.4) | 56 (27.4) | 209 (22.1) |  |
 Versatile anal intercourse | 503 | 43.7 (41.0–46.6) | 115 (56.4) | 388 (41.0) |  |
UAI with regular partners in the past 6 months | |||||
 Yes | 301 | 41.5 (37.7–44.9) | 84 (55.6) | 217 (37.7) | < 0.001 |
 No | 425 | 58.5 (55.1–62.3) | 67 (44.4) | 358 (62.3) |  |
UAI with casual partners in the past 6 months | |||||
 Yes | 248 | 33.0 (29.7–36.3) | 70 (44.0) | 178 (30.0) | 0.001 |
 No | 504 | 67.0 (63.7–70.3) | 89 (56.0) | 415 (70.0) |  |
Number of male sex partners in the past 6 months | |||||
 < 2 | 462 | 40.1 (37.4–42.9) | 39 (19.1) | 423 (44.7) | < 0.001 |
 ≥ 2 | 503 | 43.7 (40.9–46.6) | 75 (36.8) | 428 (45.2) |  |
 ≥ 5 | 186 | 16.2 (14.0–18.1) | 90 (44.1) | 96 (10.1) |  |
Group sex in the past 6 months | |||||
 Yes | 67 | 5.8 (4.4–7.2) | 49 (24.0) | 18 (1.9) | < 0.001 |
 No | 1084 | 94.2 (92.8–95.6) | 155 (76.0) | 929 (98.1) |  |
Condomless internal ejaculation during anal sex in the past 6 months | |||||
 Yes | 480 | 41.7 (38.7–44.7) | 116 (56.9) | 364 (38.4) | < 0.001 |
 No | 671 | 58.3 (55.3–61.3) | 88 (43.1) | 583 (61.6) |  |
HIV testing in the past 6 months | |||||
 Yes | 428 | 37.2 (34.6–39.8) | 91 (44.6) | 337 (35.6) | 0.016 |
 No | 723 | 62.8 (60.2–65.4) | 113 (55.4) | 610 (64.4) |  |
HIV infection | |||||
 Yes | 193 | 16.8 (14.7–18.9) | 55 (27.0) | 138 (14.6) | < 0.001 |
 No | 958 | 83.2 (81.1–85.3) | 149 (73.0) | 809 (85.4) |  |
Syphilis infection | |||||
 Yes | 145 | 12.6 (10.7–14.5) | 44 (21.6) | 101 (10.7) | < 0.001 |
 No | 1006 | 87.4 (85.5–89.3) | 160 (78.4) | 846 (89.3) |  |