Table 1.
Gestational age, birth weight, and male to female ratio of the neonates in the four studies on hypoxic ischemic encephalopathy (HIE) and heart rate variability
| HIE severity | Number of neonates | Gestational age (weeks) | Birth weight (g) | M/F-ratio | |
|---|---|---|---|---|---|
| Aliefendioglu et al. 2012, Turkey [19] |
Severe HIE Moderate HIE |
10 12 |
39 (0.78) a 39 (0.72) a |
3500 (515) a 3433 (557) a |
6/4 8/4 |
| No HIE | 24 | 39 (0.88) a | 3283 (379) a | 14/10 | |
| Vergales et al. 2013, USA [20] | Severe, moderate, mild, and no HIE | 67 | 38 (1.4) a | 3236 (511) a | NDA |
| Goulding et al. 2015, Ireland [21] | Severe, moderate, and mild HIE | 44 | 39 (36, 42) b | 3384 (1830, 5040) b | 26/18 |
| No HIE | 17 | 40 (38, 41) b | 3601 (2980, 4060) b | 11/6 | |
| Goulding et al. 2017, Ireland [22] | Severe, moderate, and mild HIE | 74 | 40 (39, 41) c | 3425 (3165, 3745) c | 40/34 |
a Values are presented as mean (standard deviation). b Values are presented as mean (minimum to maximum)
c Values are presented as median (lower to upper quartile)
M/F-ratio, male to female ratio; NDA, no data available