| Characteristic | M hominis+ | M hominis− | OR (95% CI) | G vaginalis+ | G vaginalis− | OR (95% CI) |
| n = 3 | n = 21 | n = 9 | n = 20 | |||
| No (%) | No (%) | No (%) | No (%) | |||
| Demographic | ||||||
| Age, years | ||||||
| <25 | 2 (66.7) | 12 (57.1) | 5 (55.6) | 14 (70.0) | ||
| ⩾25 | 1 (33.3) | 9 (42.9) | 1.5 (0.1 to 19.2) | 4 (44.4) | 6 (30.0) | 0.5 (0.1 to 2.7) |
| Race/ethnicity | ||||||
| African American | 2 (66.7) | 9 (42.9) | 7 (77.8) | 8 (40.0) | ||
| White/Hispanic/other | 1 (33.3) | 12 (57.1) | 2.7 (0.2 to 34.2) | 2 (22.2) | 12 (60.0) | 5.3 (0.9 to 32.0) |
| Education | ||||||
| <High school | 1 (33.3) | 6 (28.6) | 4 (44.4) | 6 (30.0) | ||
| ⩾High school | 2 (66.7) | 15 (71.4) | 1.3 (0.1 to 16.5) | 5 (55.6) | 14 (70.0) | 1.9 (0.4 to 9.5) |
| Insured | ||||||
| No | 2 (100.0) | 9 (64.3) | 2 (50.0) | 10 (71.4) | ||
| Yes | 0 (0.0) | 5 (35.7) | – | 2 (50.0) | 4 (28.6) | 0.4 (0.04 to 3.9) |
| Medical history | ||||||
| History of STI | 3 (100.0) | 13 (61.9) | – | 4 (44.4) | 13 (65.0) | 0.4 (0.1 to 2.1) |
| History of GC | 1 (33.3) | 5 (23.8) | 1.6 (0.2 to 21.6) | 2 (22.2) | 4 (20.0) | 1.1 (0.2 to 7.8) |
| History of CT | 2 (66.7) | 9 (42.9) | 2.7 (0.2 to 34.2) | 2 (22.2) | 9 (45.0) | 0.4 (0.1 to 2.1) |
| History of Trichomonas | 2 (66.7) | 3 (14.3) | 12.0 (0.8 to 177.4) | 3 (33.3) | 3 (15.0) | 2.8 (0.4 to 18.0) |
| History of BV | 2 (66.7) | 3 (14.3) | 12.0 (0.8 to 177.4) | 1 (11.1) | 4 (20.0) | 0.5 (0.1 to 5.2) |
| History of PID | 2 (66.7) | 2 (10.0) | 18.0 (1.1 to 299.0) | 0 (0.0) | 3 (15.0) | – |
| Sexual history | ||||||
| Sexually active | 3 (100.0) | 19 (90.5) | – | 8 (88.9) | 18 (90.0) | 0.9 (0.1 to 11.3) |
| Rare/occasional condom use* | 1 (33.3) | 14 (73.7) | 0.2 (0.01 to 2.4) | 7 (87.5) | 11 (61.1) | 4.5 (0.5 to 44.4) |
| New sexual partner | 1 (33.3) | 3 (14.3) | 3.0 (0.2 to 44.4) | 2 (22.2) | 0 (0.0) | – |
| Behavioural | ||||||
| Douched within last month | 2 (66.7) | 9 (42.9) | 2.7 (0.2 to 34.2) | 6 (66.7) | 7 (35.0) | 3.7 (0.7 to 19.6) |
| Drug use | 0 (0.0) | 6 (28.6) | – | 4 (44.4) | 2 (10.0) | 7.2 (1.01 to 20.0) |
| Current smoker | 0 (0.0) | 10 (47.6) | – | 6 (66.7) | 8 (40.0) | 3.0 (0.6 to 15.6) |
*Condoms used in 0–5 out of 10 sexual encounters. BV, bacterial vaginosis; CT, Chlamydia trachomatis; GC, gonococcus; OR, odds ratio; PID, pelvic inflammatory disease; STI, sexually transmitted infection.