Rounded score charts based on registry data and registry plus questionnaire data
| Registry | Registry+questionnaire | Total | Probability | |||
|---|---|---|---|---|---|---|
| Predictor | Women | Men | Women | Men | points | Ct (%) |
| Start | 7 | 7 | ||||
| Age group (years) | 0 | 0.2 | ||||
| 15–19 | 6 | 4 | 5 | 2 | 1 | 0.3 |
| 20–24 | 4 | 4 | 3 | 3 | 2 | 0.4 |
| 25–29 | 2 | 2 | 1 | 1 | 3 | 0.5 |
| Ethnicity | 4 | 0.6 | ||||
| Dutch | 0 | 0 | 0 | 0 | 5 | 0.8 |
| Turkish/North African | 1 | 1 | 0 | 0 | 6 | 1.1 |
| Surinamese/Antillean | 4 | 4 | 3 | 3 | 7 | 1.3 |
| African other | 4 | 4 | 3 | 3 | 8 | 1.7 |
| Non-Western other | 1 | 1 | 1 | 1 | 9 | 2.2 |
| Western other | 1 | 1 | 1 | 1 | 10 | 2.8 |
| Education | 11 | 3.5 | ||||
| Low | 3 | 3 | 12 | 4.5 | ||
| Intermediate | 3 | 3 | 13 | 5.7 | ||
| High | 0 | 0 | 14 | 7.2 | ||
| Partners in previous 6 months | 15 | 9.0 | ||||
| 0–1 | 0 | 0 | 16 | 11 | ||
| 2 | 2 | 2 | 17 | 14 | ||
| 3+ | 2 | 2 | 18 | 17 | ||
| New contacts in previous 2 months | 19 | 21 | ||||
| Yes | 1 | 1 | 20 | 26 | ||
| No | 0 | 0 | 21 | 31 | ||
| Ethnicity mixing with regular partner | 22 | 36 | ||||
| No partner | 0 | 0 | 23 | 42 | ||
| Dutch, Dutch partner | 0 | 0 | 24 | 48 | ||
| Dutch, non-Dutch partner | 4 | 4 | 25 | 54 | ||
| Non-Dutch, Dutch partner | 0 | 0 | ||||
| Non-Dutch, non-Dutch partner | 3 | 3 | ||||
| Condom use last sexual contact with regular partner | ||||||
| Yes | 0 | 0 | ||||
| No | 1 | 1 | ||||
| Casual partners | ||||||
| Yes | 3 | 3 | ||||
| No | 0 | 0 | ||||
| Condom use last sexual contact with casual partner | ||||||
| Yes | 0 | 0 | ||||
| No | 2 | 2 | ||||
| History of self-reported sexually transmitted infection | ||||||
| Yes | 2 | 2 | ||||
| No | 0 | 0 | ||||
| Complaints | ||||||
| Yes | 1 | 2 | ||||
| No | 0 | 0 | ||||
| LPS=−5.9427+0.2481× total points | ||||||
| Probability Ct=1/(1+exp (−LPS)) | ||||||
Ct, Chlamydia trachomatis.