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 | Â | Â | Â | Â | Â | Â | Â | Â |
< 40 th percentile | 25 | 0 | 238 | 382 | 100.0 | 38.4 | 6.1 | 100.0 |
< 75 th percentile | 21 | 4 | 447 | 173 | 84.0 | 72.1 | 10.8 | 99.1 |
49 to 72 hours | Â | Â | Â | Â | Â | Â | Â | Â |
< 40 th percentile | 22 | 1 | 732 | 293 | 95.7 | 71.4 | 7.0 | 99.9 |
< 75 th percentile | 17 | 6 | 963 | 62 | 73.9 | 94.0 | 21.5 | 99.4 |
73 to 96 hours | Â | Â | Â | Â | Â | Â | Â | Â |
< 40 th percentile | 7 | 0 | 374 | 93 | 100 | 80.1 | 7.0 | 100 |
< 75 th percentile | 6 | 1 | 451 | 16 | 85.7 | 96.6 | 27.3 | 99.8 |