Table 4 Risk algorithm performance to identify NG or CT infection in symptomatic women compared with Rwandan National Criteria
| Â | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
Risk Score | ||||
 Derivation cohort | ||||
  Score > =4 | 91% | 36% | 43% | 88% |
  Score > =5 | 81% | 54% | 48% | 85% |
  Score > =6 | 65% | 74% | 57% | 80% |
  Score > =7 | 44% | 84% | 59% | 74% |
 External validation cohort | ||||
  Score > =4 | 79% | 33% | 32% | 80% |
  Score > =5 | 67% | 48% | 34% | 79% |
  Score > =6 | 53% | 66% | 38% | 78% |
  Score > =7 | 35% | 79% | 39% | 76% |
Rwanda National Criteria | ||||
 Derivation cohort | ||||
  Score > =2a | 26% | 89% | 55% | 69% |