Table 5.
Ability of TSB measurements over the 40th and 75th percentile of Buthani nomogram to predict significant hyperbilirubinaemia, for designated time periods.
| Hours of age | TP (n) |
FN (n) |
TN (n) |
FP (n) |
Sensitivity (%) |
Specificity (%) |
PPV (%) |
NPV (%) |
|---|---|---|---|---|---|---|---|---|
| 24 to 48 hours | ||||||||
| < 40th percentile | 25 | 0 | 238 | 382 | 100.0 | 38.4 | 6.1 | 100.0 |
| < 75th percentile | 21 | 4 | 447 | 173 | 84.0 | 72.1 | 10.8 | 99.1 |
| 49 to 72 hours | ||||||||
| < 40th percentile | 22 | 1 | 732 | 293 | 95.7 | 71.4 | 7.0 | 99.9 |
| < 75th percentile | 17 | 6 | 963 | 62 | 73.9 | 94.0 | 21.5 | 99.4 |
| 73 to 96 hours | ||||||||
| < 40th percentile | 7 | 0 | 374 | 93 | 100 | 80.1 | 7.0 | 100 |
| < 75th percentile | 6 | 1 | 451 | 16 | 85.7 | 96.6 | 27.3 | 99.8 |