Table 1.
Characteristics of infants diagnosed with convulsions
| Entire cohort | Hypothermia-Treated HIE Subcohort | |
|---|---|---|
| N = 6,245 | N = 561 | |
| n (%)a | n (%)a | |
| Birth gestation (weeks) | ||
| ≤24 | 273 (4.4) | 0 |
| 25–28 | 357 (5.7) | 0 |
| 29–34 | 582 (9.3) | 10 (1.8) |
| 35–36 | 698 (11.2) | 90 (16.0) |
| ≥37 | 4,335 (69.4) | 461 (82.2) |
| Sex | ||
| Female | 2,680 (42.9) | 232 (41.4) |
| Diagnoses | ||
| Hypoxic ischemic encephalopathy | 2,451 (39.3) | 561 (100.0) |
| Mild | 112 (1.8) | 16 (2.9) |
| Moderate | 325 (5.2) | 103 (18.4) |
| Severe | 662 (10.6) | 170 (30.3) |
| Unspecified | 1,352 (21.7) | 272 (48.5) |
| Ischemic or hemorrhagic stroke | 447 (7.2) | 22 (3.9) |
| Intraventricular hemorrhage | 523 (8.4) | 7 (1.3) |
| Other hemorrhagic stroke | 802 (12.8) | 51 (9.1) |
| Congenital brain abnormalities | 712 (11.4) | 14 (2.5) |
| Chromosomal abnormalities | 194 (3.1) | 2 (0.4) |
a
Percentages were derived using column N as the denominator.