Prevalence of Chlamydia trachomatis infections at the remaining two sites among men who have sex with men who had negative result at pharyngeal, rectal and urethral sites, respectively
| Negative site | Positive site | Prevalence (95% CI) | P value | ||
| Overall | HIV positive | HIV negative | |||
| Pharyngeal (n=1562) | Rectal (n=223) | 14.3 (12.6 to 16.1) | 27.6 (22.5 to 33.2) | 11.3 (9.6 to 13.2) | <0.001 |
| Urethral (n=110) | 7.0 (5.8 to 8.4) | 10.1 (6.9 to 14.2) | 6.4 (5.1 to 7.8) | 0.02 | |
| Rectal or urethral (n=301) | 19.3 (17.3 to 21.3) | 32.9 (27.5 to 38.6) | 16.2 (14.2 to 18.4) | <0.001 | |
| Rectal (n=1368) | Pharyngeal (n=29) | 2.1 (1.4 to 3.0) | 3.7 (1.6 to 7.2) | 1.8 (1.1 to 2.8) | 0.08 |
| Urethral (n=79) | 5.8 (4.6 to 7.2) | 7.0 (4.0 to 11.2) | 5.6 (4.3 to 7.0) | 0.41 | |
| Pharyngeal or urethral (n=107) | 7.8 (6.5 to 9.4) | 10.7 (6.9 to 15.6) | 7.3 (5.9 to 8.9) | 0.09 | |
| Urethral (n=1498) | Pharyngeal (n=46) | 3.1 (2.3 to 4.1) | 6.2 (3.7 to 9.7) | 2.4 (1.6 to 3.4) | 0.001 |
| Rectal (n=209) | 14.0 (12.2 to 15.8) | 27.0 (21.8 to 32.7) | 11.0 (9.3 to 12.9) | <0.001 | |
| Pharyngeal or rectal (n=237) | 15.8 (14.0 to 17.8) | 29.9 (24.6 to 35.7) | 12.7 (10.9 to 14.7) | <0.001 | |