Univariable and multivariable analyses of determinants for using rectal douches among 994 men who have sex with men attending the STI outpatient clinic of Amsterdam, February to April 2011
| Total (N=994) | Univariable | p Value | Multivariable* | p Value | |
|---|---|---|---|---|---|
| n (% within group) | OR (95% CI) | aOR (95% CI) | |||
| Age (years) | <0.001 | 0.005 | |||
| <35 | 143/392 (36.5) | 1 | 1 | ||
| 35–44 | 156/291 (53.6) | 2.0 (1.5 to 2.7) | 1.8 (1.2 to 2.7) | ||
| ≥45 | 161/311 (51.8) | 1.9 (1.4 to 2.5) | 1.6 (1.1 to 2.4) | ||
| Ethnicity | 0.058 | ||||
| Dutch | 338/701 (48.2) | 1 | |||
| Non-Dutch | 122/293 (41.6) | 0.8 (0.6 to 1.0) | |||
| Number of sex partners† | <0.001 | 0.007 | |||
| Log number of sex partners | 1.4 (1.2 to 1.6) | 1.2 (1.1 to 1.4) | |||
| HIV status‡ | <0.001 | <0.001 | |||
| HIV negative | 240/702 (34.2) | 1 | 1 | ||
| HIV positive | 218/289 (75.4) | 2.2 (1.4 to 3.4) | 3.6 (2.5 to 5.3) | ||
| Most high-risk type of partner§ | 0.441 | ||||
| Steady partner | 48/110 (43.6) | 1 | |||
| Known casual/ex-steady partner | 125/285 (43.9) | 1.0 (0.6 to 1.6) | |||
| Casual partner | 200/404 (49.5) | 1.3 (0.8 to 1.9) | |||
| Anonymous partner/sex worker/client | 87/191 (45.5) | 1.1 (0.7 to 1.7) | |||
| CAS | <0.001 | 0.002 | |||
| No CAS (always condom or no anal sex) | 170/493 (34.5) | 1 | 1 | ||
| CAS (no or inconsistent condom use or condom failure) | 290/501 (57.9) | 2.6 (2.0 to 3.4) | 1.7 (1.2 to 2.3) | ||
| Sexual position¶ | <0.001 | <0.001 | |||
| No anal sex | 9/112 (8.0) | 1 | 1 | ||
| Insertive anal sex only | 12/199 (6.0) | 0.7 (0.3 to 1.8) | 0.4 (0.2 to 1.1) | ||
| Receptive anal sex only | 70/121 (57.9) | 15.7 (7.3–34.0) | 10.8 (4.7 to 24.4) | ||
| Insertive and receptive anal sex | 369/558 (66.1) | 22.2 (11.1–45.2) | 11.6 (5.5 to 24.5) | ||
*In multivariable model, 987 MSM were included of whom 458 used rectal douches.
†Per 1 log increase.
‡Missing number of HIV status is n=3.
§Missing number of most high-risk type of partner is n=4.
¶Missing number of sexual position is n=4.
CAS, condomless anal sex.