Validity, sensitivity, specificity, PPV and NPV of self-reporting hysterectomy compared to the gold standard of ultrasound scanning
| Self-reported hysterectomy | |||
|---|---|---|---|
| RQ (%) | IF (%) | RQ and IF (%) | |
| Validity | 99.6 | 98.9 | 99.8 |
| Sensitivity | 98.9 | 98.4 | 99.6 |
| Specificity | 99.7 | 99.1 | 99.9 |
| PPV | 98.9 | 95.9 | 99.4 |
| NPV | 99.7 | 99.7 | 99.9 |
IF, interview format; NPV, negative predictive value; PPV, positive predictive value; RQ, recruitment questionnaire.