| MSM (n = 1473) | MSW (n = 7835) | Women (n = 5647) | |||||||
| Cases Ct/GC+ | Controls Ct/GC− | RR | Cases Ct/GC+ | Controls Ct/GC− | RR | Cases Ct/GC+ | Controls Ct/GC− | RR | |
| No (%) | No (%) | 95% CI | No (%) | No (%) | 95% CI | No (%) | No (%) | 95% CI | |
| Main exposure | |||||||||
| Sex with internet partner | |||||||||
| <4 months ago | 62 (25.1) | 277 (22.6) | 1.11 | 24 (1.4) | 168 (2.7) | 0.53 | 11 (1.2) | 87 (1.8) | 0.68 |
| >4 months/Never | 185 (74.9) | 949 (77.4) | (0.87 to 1.41) | 1645 (98.6) | 5998 (97.3) | (0.35 to 0.81) | 875 (98.8) | 4674 (98.2) | (0.36 to 1.27) |
| Covariates | |||||||||
| Race/ethnicity | |||||||||
| Non-white | 91 (36.8) | 437 (35.6) | 1.03 | 1398 (83.8) | 3739 (60.6) | 1.38 | 653 (73.7) | 3030 (63.6) | 1.16 |
| White | 156 (63.2) | 789 (64.4) | (0.86 to 1.24) | 271 (16.2) | 2427 (39.4) | (1.34 to 1.42) | 233 (26.3) | 1731 (36.4) | (1.11 to 1.21) |
| Age | |||||||||
| ⩽30 years | 150 (60.7) | 630 (51.4) | 1.18 | 1326 (79.5) | 3763 (61.0) | 1.30 | 775 (87.5) | 3374 (70.9) | 1.23 |
| >30 years | 97 (39.3) | 596 (48.6) | (1.05 to 1.32) | 343 (20.5) | 2403 (39.0) | (1.26 to 1.35 | 111 (12.5) | 1387 (29.1) | (1.20 to 1.27) |
| Number of partners in past 3 months | |||||||||
| >1 partner | 183 (74.1) | 749 (61.1) | 1.21 | 871 (52.2) | 2628 (42.6) | 1.22 | 340 (38.4) | 1538 (32.3) | 1.19 |
| ⩽1 partner | 64 (25.9) | 477 (38.9) | (1.11 to 1.32) | 798 (47.8) | 3538 (57.4) | (1.16 to 1.29) | 546 (61.6) | 3223 (67.7) | (1.08 to 1.30) |
| History of GC | |||||||||
| Yes | 61 (24.7) | 222 (18.1) | 1.36 | 229 (13.7) | 575 (9.3) | 1.47 | 116 (13.1) | 513 (10.8) | 1.22 |
| No | 186 (75.3) | 1004 (81.9) | (1.06 to 1.75) | 1440 (86.3) | 5591 (90.7) | (1.27 to 1.70) | 770 (86.9) | 4248 (89.2) | (1.00 to 1.47) |
| History of Ct | |||||||||
| Yes | 34 (13.8) | 136 (11.1) | 1.24 | 322 (19.3) | 1048 (17.0) | 1.14 | 315 (35.6) | 1406 (29.5) | 1.20 |
| No | 213 (86.2) | 1090 (88.9) | (0.87 to 1.76) | 1347 (80.7) | 5118 (83.0) | (1.01 to 1.27) | 571 (64.5) | 3355 (70.5) | (1.09 to 1.33) |
| Current HIV status | |||||||||
| Positive | 30 (12.1) | 96 (7.8) | 1.55 | 1 (0.1) | 8 (0.1) | 0.46 | 3 (0.3) | 9 (0.2) | 1.79 |
| Negative/unknown | 217 (87.9) | 1130 (92.2) | (1.05 to 2.29) | 1668 (99.9) | 6158 (99.9) | (0.06 to 3.69) | 883 (99.7) | 4752 (99.3) | (0.49 to 6.60) |
MSM, men who have sex with men; MSW, men who have sex with women; RR, risk ratio.