Crude and adjusted odds ratios (OR) for organisms and behavioural risk factors
| Cases (%) | Controls (%) | Crude OR (95% CI) | Adjusted OR* | ||
|---|---|---|---|---|---|
| *The first adjusted analysis included having a casual sexual partner in the previous month, past urethral symptoms, and the presence of other urethral organisms and a second adjusted analysis included anal sex with regular partner and vaginal and oral sex with casual partners. | |||||
| †Refers to similar symptoms in a separate episode more than 1 month earlier. | |||||
| Number | 80 | 79 | |||
| Chlamydia trachomatis | 17 (21.3) | 1 (1.3) | 21.0 (2.7 to 163) | 27 (3.4 to 222) | |
| Ureaplasma urealyticum (culture or PCR) | 23 (28.8) | 26 (32.9) | 0.8 (0.4 to 1.6) | 0.5 (0.3 to 1.4) | |
| All streptococci | 28 (35.0) | 14 (17.7) | 2.5 (1.2 to 5.2) | 3.2 (1.1 to 9.6) | |
| Group B Streptococcus | 11(13.8) | 5(6.3) | 2.4 (0.8 to 7.1) | 2.1 (0.5 to 11.4) | |
| Haemophilus influenzae | 2 (2.5) | 0 | p = 0.5 | ||
| Gardnerella vaginalis | 11 (13.8) | 2 (2.5) | 6.1 (1.3 to 29) | 9.0 (1.6 to 52) | |
| Mycoplasma genitalium | 5 (6) | 1 (1.3) | 4.1 (0.5 to 37) | 6.1 (0.6 to 61) | |
| Previous similar symptoms† | 36 (45) | 19 (24) | 2.5 (1.2 to 5.4) | 2.4 (1.1 to 5.4) | |
| Regular sexual partner | 44 (57.1) | 48(64.0) | 0.8 (0.4 to 1.4) | ||
| Vaginal sex | 39 (51.3) | 38 (51.4) | 1.0 (0.5 to 1.9) | ||
| Oral sex | 36 (47.4) | 38(51.4) | 0.9 (0.4 to 1.6) | ||
| Anal sex | 11 (14.5) | 4 (5.5) | 2.9 (0.9 to 9.6) | 3.5 (1.0 to 13) | |
| p = 0.05 | |||||
| Casual sexual partner (past month) | 45 (58.4) | 17 (23.3) | 4.6 (2.3 to 9.4) | ||
| Vaginal sex | 0 | 38 (50) | 59 (68) | 1.0 | 1.0 |
| 1 | 21(28) | 12 (16) | 1.9 (0.9 to 4.3) | 2.1 (0.7 to 6.1) | |
| >1 | 17(22) | 2 (3) | 10.2 (2.3 to 46.1) | 9.3 (1.3 to 65) | |
| p trend 0.01 | |||||
| Oral sex | 1 | 18 (24.0) | 8 (11.1) | 2.5 (1.0 to 6.3) | 1.8 (0.5 to 6.1) |
| >1 | 16 (13.3) | 4 (5.6) | 4.6 (1.5 to 14.6) | 1.7 (0.3 to 8.5) | |
| 0.7 (0.1 to 3.7) | |||||
| p trend 0.15 | |||||
| Anal sex | Any | 3 (4.3) | 1 (1.4) | 3.1 (0.3 to 30.9) | |
| 1 | 2 (2.9) | 1 (1.4) | 2.1 (0.2 to 23.2) | ||
| >1 | 1 (1.4) | - | |||