Variable | Total (n = 397) | Rectal (n = 247) | Relative risk (95% CI) | p Value |
Age (years) | ||||
⩽27 | 99 | 66 (66.68) | 1.35 (0.75 to 2.42) | 0.4902 |
28–32 | 115 | 73 (63.48) | 1.12 (0.64 to 1.95) | |
33–38 | 86 | 49 (56.98) | 0.85 (0.47 to 1.54) | |
>38 | 97 | 59 (60.82) | 1 | |
Ethnicity | ||||
Unknown | 10 | 6 (60.00) | 0.87 (0.24 to 3.15) | 0.8085 |
Other | 66 | 39 (59.09) | 0.84 (0.49 to 1.44) | |
White | 321 | 202 (62.93) | 1 | |
Rectal microscopy | ||||
Negative | 304 | 194 (63.82) | 1 | |
Positive | 74 | 50 (67.57) | 1.16 (0.68 to 2.00) | 0.341 |
Missing* | 19 | 3 (15.79) | ||
Urethral chlamydia | ||||
Negative | 232 | 230 (99.14) | 1 | |
Positive | 165 | 17 (10.30) | 0.00 (0.00 to 0.00) | <0.0001 |
Gonorrhoea (all sites)† | ||||
Negative | 337 | 204 (60.53) | 1 | |
Positive | 60 | 43 (71.67) | 1.63 (0.89 to 2.98) | 0.1043 |
Rectal gonorrhoea | ||||
Negative | 360 | 214 | 1 | |
Positive | 37 | 33 | 5.37 (1.86 to 15.51) | 0.0002 |
Syphilis | ||||
Negative | 382 | 237 (62.04) | 1 | |
Positive | 15 | 10 (66.67) | 1.21 (0.41 to 3.61) | 0.7301 |
Warts | ||||
Negative | 365 | 221 (60.55) | 1 | |
Positive | 32 | 26 (81.25) | 2.79 (1.12 to 6.95) | 0.0164 |
HIV | ||||
Negative | 273 | 153 (56.04) | 1 | |
Positive | 124 | 94 (75.81) | 2.53 (1.56 to 4.08) | <0.001 |
*Missing, microscopy was not performed.
†All cases of gonorrhoea. Some men had infection at more than one site.