Univariable and multivariable analysis of determinants for anorectal chlamydia, gonorrhoea and/or Lymphogranuloma venereum (n=96) among 679 men who have sex with men who reported receptive anal sex attending the STI outpatient clinic of Amsterdam, February to April 2011
| Total (N=679) | Univariable | p Value | Multivariable* | p Value | |
|---|---|---|---|---|---|
| n (% within group) | OR (95% CI) | aOR (95% CI) | |||
| Age (years) | 0.160 | 0.006 | |||
| <35 | 45/262 (17.2) | 1.7 (1.0 to 2.9) | 2.6 (1.4 to 4.6) | ||
| 35–44 | 28/209 (13.4) | 1.2 (0.7 to 2.2) | 1.5 (0.8 to 2.8) | ||
| ≥45 | 23/208 (11.1) | 1 | 1 | ||
| Ethnicity | 0.043 | ||||
| Dutch | 59/477 (12.4) | 1 | |||
| Non-Dutch | 37/202 (18.3) | 1.6 (1.0 to 2.5) | |||
| Number of sex partners | 0.025 | 0.039 | |||
| Log number of sex partners† | 1.2 (1.0 to 1.5) | 1.2 (1.0 to 1.5) | |||
| HIV status‡ | <0.001 | 0.002 | |||
| HIV negative | 44/425 (10.4) | 1 | 1 | ||
| HIV positive | 51/252 (20.2) | 2.2 (1.4 to 3.4) | 2.2 (1.3 to 3.6) | ||
| Most high-risk type of partner | 0.800 | ||||
| Steady partner | 12/78 (15.4) | 1 | |||
| Known casual/ex-steady partner | 24/197 (12.2) | 0.8 (0.4 to 1.6) | |||
| Casual partner | 42/276 (15.2) | 1.0 (0.5 to 2.0) | |||
| Anonymous partner/sex worker/client | 18/128 (14.1) | 0.9 (0.4 to 2.0) | |||
| CAS | 0.013 | 0.062 | |||
| No CAS (always condom) | 28/277 (10.1) | 1 | 1 | ||
| CAS (no or inconsistent condom use or condom failure) | 68/402 (16.9) | 1.8 (1.1 to 2.9) | 1.6 (1.0 to 2.6) | ||
| Rectal douching | 0.113 | 0.647 | |||
| No rectal douching | 26/240 (10.8) | 1 | 1 | ||
| Rectal douching but not sharing equipment | 49/328 (14.9) | 1.4 (0.9 to 2.4) | 1.2 (0.7 to 2.0) | ||
| Rectal douching and sharing douching equipment | 21/111 (18.9) | 1.9 (1.0 to 3.5) | 1.4 (0.7 to 2.8) | ||
*In multivariable model, 677 persons were included of whom 95 had anorectal chlamydia, gonorrhoea and/or LGV.
†Per 1 log increase.
‡Missing number of HIV status is n=2.
CAS, condomless anal sex.