| No opting out/total no in category (%) | Univariate OR (95% CI) | Adjusted OR† (95% CI) | p Value | |
| New consultations | 477/3887 (12.3) | |||
| Sexual orientation | ||||
| Bisexual (vs homosexual) | 31/477 (6.4) | 0.45 (0.31 to 0.66) | 0.41 (0.27 to 0.60) | |
| Age, years | ||||
| Mean age (tested 36.35 (SD 10.94) not tested 40.23 (SD 9.45)) | ||||
| <29 | 61/1115 (5.5) | 1 | 1 | |
| 30–39 | 170/1336 (12.7) | 2.52 (1.86 to 3.42) | 2.86 (2.08 to 3.92) | <0.001 |
| 40–49 | 183/955 (19.2) | 4.10 (3.02 to 5.55) | 4.11 (2.99 to 5.66) | <0.001 |
| ⩾50 | 63/481 (13.1) | 2.60 (1.80 to 3.77) | 2.58 (1.75 to 3.81) | <0.001 |
| Ethnicity | ||||
| Dutch (vs non-Dutch) | 366/2780 (13.2) | 1.36 (1.09 to 1.70) | – | |
| HIV test | ||||
| Never been tested before (vs ever tested) | 162/625 (25.9) | 3.27 (2.65 to 4.05) | 3.96 (3.14 to 4.99) | |
| Triage items* | ||||
| STI-related complaints (vs no complaints) | 265/1505 (17.6) | 2.19 (1.80 to 2.66) | 2.08 (1.68 to 2.57) | |
| Notified by sexual partner (vs not notified) | 81/513 (15.8) | 1.41 (1.09 to 1.83) | 1.85 (1.39 to 2.45) | |
| Receiving payment for sex (vs no payment) | 5/140 (3.6) | 0.26 (0.10 to 0.63) | – | |
| Diagnoses at consultation* | ||||
| Gonorrhoea (vs no gonorrhoea) | 69/340 (20.3) | 1.96 (1.48 to 2.60) | 1.76 (1.29 to 2.41) | |
| Chlamydia (vs no chlamydia) | 51/342 (14.9) | 1.28 (0.94 to 1.76) | – | |
| Hepatitis B carrier (vs no carrier) | 3/22 (13.6) | 1.13 (0.33 to 3.83) | – | |
| Infectious syphilis (vs no infectious syphilis) | 21/99 (21.2) | 1.97 (1.20 to 3.22) | 1.73 (1.02 to 2.93) | |
| Genital HSV I/II (vs no HSV) | 5/50 (10.0) | 0.79 (0.31 to 2.01) | – | |
| Genital warts (vs no warts) | 22/180 (12.2) | 0.99 (0.63 to 1.57) | – | |
| Syndromes | ||||
| Non-specific proctitis (vs no proctitis) | 28/149 (18.8) | 1.70 (1.11 to 2.59) | 1.64 (1.04 to 2.57) | |
| Non-specific ulcus (vs no or specific ulcus) | 7/56 (12.5) | 1.02 (0.46 to 2.27) | – | |
| Non-specific urethritis (vs no urethritis) | 70/529 (13.2) | 1.11 (0.84 to 1.45) | – | |
| Anal sex | ||||
| No anal sex or anal sex with condom | 290/2074 (14.0) | 1 | 1 | |
| UAI with casual partner only | 100/937 (10.7) | 0.74 (0.58 to 0.94) | 0.75 (0.58 to 0.97) | <0.05 |
| UAI with steady partner only | 75/718 (10.4) | 0.72 (0.55 to 0.94) | 0.76 (0.57 to 1.01) | |
| UAI with casual and steady partners | 12/158 (7.6) | 0.51 (0.28 to 0.92) | 0.44 (0.23 to 0.83) | <0.001 |
| Injecting drug use | 0/15 (0) | – |
*Visitors may score on several items; †Odds ratios (OR) in the multivariate model are adjusted for all factors for which adjusted OR are shown. HSV, herpes simplex virus; MSM, men who have sex with men; STI, sexually transmitted infection; UAI, unprotected anal intercourse.