Bacterial STI | |||||
Positive | Negative | Overall | OR (95% CI) | P value | |
Overall | 281 | 5121 | 5402 | ||
Gender, n (%) | |||||
Female | 102 (36.3) | 1854 (36.2) | 1956 (36.2) | Ref. | |
Male | 178 (63.3) | 3229 (63.1) | 3229 (63.1) | 1.0 (0.8 to 1.3) | 0.988 |
Missing | 1 (0.4) | 38 (0.7) | 39 (0.7) | – | |
Mean age in years (SD) | 31.4 (9.3) | 33.6 (10.0) | 33.5 (10.0) | 0.98 (0.96 to 0.99) | < 0.001 |
Sexual orientation and behaviour, n (%) | |||||
Heterosexual man | 59 (21.0) | 1790 (35.0) | 1849 (34.2) | Ref. | |
Heterosexual woman | 77 (27.4) | 1162 (22.7) | 1239 (22.9) | 2.0 (1.4 to 2.9) | < 0.001 |
MSM | 59 (21.0) | 594 (11.6) | 647 (12.5) | 4.1 (2.9 to 5.8) | < 0.001 |
Other or missing | 65 (23.1) | 1575 (30.8) | 1640 (30.4) | – | |
Paid for sex | 22 (7.8) | 517 (10.1) | 539 (10.0) | 1.4 (0.9 to 2.3) | 0.139 |
Alcohol use for sex | 37 (13.2) | 563 (11.0) | 600 (11.1) | 1.2 (0.8 to 1.7) | 0.390 |
Recreational drugs for sex | 52 (18.5) | 386 (7.5) | 438 (8.1) | 2.8 (2.0 to 3.8) | < 0.001 |
Condom use with casual sex partners, n (%) | |||||
Always | 47 (16.7) | 1236 (24.1) | 1283 (23.8) | Ref. | |
Sometimes or never | 88 (31.3) | 1459 (28.5) | 1547 (28.6) | 1.6 (1.1 to 2.3) | 0.013 |
Missing | 146 (52.0) | 2426 (47.4) | 2572 (47.6) | – | |
Previous STIs | 61 (21.7) | 584 (11.4) | 645 (11.9) | 2.2 (1.6 to 2.9) | < 0.001 |
Use of sex toys | 69 (24.6) | 1178 (23.0) | 1247 (23.1) | 1.1 (0.8 to 1.4) | 0.690 |
Number of sex partners in total in last 12 months, n (%) | |||||
0–2 | 49 (17.4) | 1527 (29.8) | 1576 (29.2) | Ref. | |
3–5 | 81 (28.8) | 1376 (26.9) | 1457 (27.0) | 1.8 (1.3 to 2.7) | 0.001 |
6 or more partners | 78 (27.8) | 756 (14.8) | 834 (15.4) | 3.2 (2.2 to 4.7) | < 0.001 |
Missing | 73 (26.0) | 1462 (28.5) | 1535 (28.4) | – |
Bacterial STI: chlamydia and/or gonorhoea and/or syphilis positive. If not specified, reference categories for ORs are absence of the characteristic.
MSM, men who have sex with men; OR, odds ratio.