Additional Table 2.
Absolute and relative power of the heart rate variability bands in the three groups
| Healthy (n=17) | Premature (n=14) | HIE (n=19) | Total (N=50) | |
|---|---|---|---|---|
| HF | ||||
| Range | 4.4 -9.9 | 4.0 -8.5 | 5.6 -9.1 | 4.0 -9.9 |
| Median (IQR) | 7.6 (6.8, 8.4) | 7.3 (6.8, 8.1) | 7.7 (7.0, 8.2) | 7.6 (6.8, 8.2) |
| Mean (SD) | 7.5 (1.4) | 7.2 (1.2) | 7.5 (1.0) | 7.5 (1.2) |
| LF | ||||
| Range | 5.3 -9.2 | 5.0 -8.2 | 6.1 -8.2 | 5.0 -9.2 |
| Median (IQR) | 7.6 (7.1, 7.8) | 7.3 (7.0, 7.7) | 7.3 (7.0, 7.8) | 7.4 (7.0, 7.8) |
| Mean (SD) | 7.5 (1.0) | 7.1 (0.9) | 7.3 (0.6) | 7.3 (0.8) |
| VLF | ||||
| Range | 5.8 -8.7 | 4.7 -7.5 | 6.0 -8.0 | 4.7 -8.7 |
| Median (IQR) | 6.7 (6.4, 7.4) | 6.8 (5.8, 7.1) | 6.7 (6.5, 7.1) | 6.8 (6.4, 7.3) |
| Mean (SD) | 7.0 (0.9) | 6.5 (0.8) | 6.8 (0.6) | 6.8 (0.8) |
| HF% | ||||
| Range | 23.6 -72.6 | 26.2 -79.3 | 24.0 -71.9 | 23.6 -79.3 |
| Median (IQR) | 53.8 (48.9, 57.1) | 50.8 (45.0, 62.1) | 60.2 (50.9, 65.4) | 56.2 (48.3, 62.9) |
| Mean (SD) | 51.6 (11.8) | 52.7 (13.9) | 55.9 (13.6) | 53.5 (13.0) |
HIE: Hypoxic-ischemic encephalopathy; HF: high frequency; IQR: interquartile range; LF: low frequency; SD: standard deviation; VLF: very low frequency.