| Single testers | Repeat testers | ||||||
---|---|---|---|---|---|---|---|---|
 |  |  | Crude | Adjusted | ||||
 | n | % | n | % | OR | 95% CI | OR | 95% CI |
Total | 63,875 | 84.6 | 11,612 | 15.4 | Â | Â | Â | Â |
Age | ||||||||
 13–19 | 8543 | 13.4 | 1559 | 13.4 | 1 | – | – | – |
 20–24 | 36,471 | 57.1 | 6623 | 57.0 | 0.99 | (0.94–1.05) | – | – |
 25+ | 18,861 | 29.5 | 3430 | 29.5 | 1.00 | (0.93–1.06) | – | – |
Education levela | ||||||||
 Low/medium | 17,554 | 27.5 | 3201 | 27.6 | 1 | – | 1 | – |
 High | 37,118 | 58.1 | 5422 | 46.7 | 0.80 | (0.76–0.84) | 0.88 | (0.84–0.93) |
Ethnicity | ||||||||
 Dutch | 47,441 | 74.4 | 7906 | 68.2 | 1 | – | 1 | – |
 Western non-Dutch | 3718 | 5.8 | 613 | 5.3 | 0.99 | (0.91–1.08) | 0.91 | (0.83–1.00) |
 Non-Western | 12,650 | 19.8 | 3081 | 26.6 | 1.46 | (1.40–1.53) | 1.31 | (1.26–1.39) |
Number of sex partners in past 6Â months | ||||||||
 0–1 | 21,107 | 33.7 | 2461 | 22.3 | 1 | – | 1 | – |
 2–3 | 29,046 | 46.4 | 5162 | 46.7 | 1.52 | (1.45–1.60) | 1.56 | (1.48–1.64) |
 4+ | 12,471 | 19.9 | 3421 | 31.0 | 2.35 | (2.22–2.49) | 2.27 | (2.14–2.41) |
Condom use at last sexual contact | ||||||||
 No | 48,663 | 78.5 | 8214 | 72.6 | 1 | – | 1 | – |
 Yes | 13,294 | 21.5 | 3097 | 27.4 | 1.38 | (1.32–1.44) | 1.10 | (1.04–1.15) |
Received partner notification | ||||||||
 No | 53,816 | 84.7 | 9953 | 86.1 | 1 | – | 1 | – |
 Yes | 9749 | 15.3 | 1610 | 13.9 | 0.89 | (0.84–0.95) | 0.80 | (0.75–0.85) |
Reported STI symptoms | ||||||||
 No | 41,179 | 64.9 | 7253 | 62.8 | 1 | – | 1 | – |
 Yes | 22,257 | 35.1 | 4287 | 37.2 | 1.09 | (1.05–1.14) | 1.08 | (1.03–1.12) |
History of STI (CT/GO/SY)a,b | ||||||||
 No | 52,597 | 82.4 | 9215 | 79.4 | 1 | – | 1 | – |
 Yes | 5072 | 7.9 | 1672 | 14.4 | 1.88 | (1.77–2.00) | 1.86 | (1.74–1.98) |
Chlamydia infection | ||||||||
 No | 55,706 | 87.2 | 9136 | 78.7 | 1 | – | 1 | – |
 Yes | 8169 | 12.8 | 2476 | 21.3 | 1.85 | (1.76–1.94) | 2.00 | (1.89–2.11) |