Table 4 Ability of TcB measurements over the 50th, the 75th and the 90th percentile of TcB nomogram to predict significant hyperbilirubinaemia, for designated time periods
Hours of life | TP | FN | TN | FP | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|---|---|---|---|
24 - 48 hours | ||||||||
<50th percent | 27 | 0 | 161 | 460 | 100% | 25.9% | 5.5% | 100% |
<75th percent | 25 | 2 | 429 | 192 | 92.6% | 69.1% | 11.5% | 99.5% |
<90th percent | 14 | 13 | 564 | 57 | 51.9% | 90.8% | 19.7% | 97.7% |
49 - 72 hours | ||||||||
<50th percent | 21 | 0 | 410 | 615 | 100% | 40% | 3.3% | 100% |
<75th percent | 21 | 0 | 702 | 323 | 100% | 68.5% | 6.1% | 100% |
<90th percent | 18 | 3 | 888 | 137 | 85.7% | 86.6 | 11.6% | 99.7% |
73 - 96 hours | ||||||||
<50th percent | 7 | 0 | 246 | 220 | 100% | 52.8% | 3.1% | 100% |
<75th percent | 7 | 0 | 348 | 118 | 100% | 74.7% | 5.6% | 100% |
<90th percent | 5 | 2 | 409 | 57 | 71.4% | 87.8% | 8.1% | 99.5% |