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% |