Table 2

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 sitePositive sitePrevalence (95% CI)P value
OverallHIV positiveHIV 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