Sensitivity, specificity and positive predictive value (PPV) for several referral rules for between postnatal days 3 and 11
| Test | Sensitivity (%) | Specificity (%) | PPV (%) |
|---|---|---|---|
| 10% | 90.4 | 98.3 | 3.7 |
| −2.5 SDS | 85.5 | 99.4 | 9.2 |
| −2 SDS | 90.4 | 97.7 | 2.7 |
| −2.5 SDS 3–6 days | 85.5 | 99.4 | 9.2 |
| and 10% 7–11 days |