Table 1.
Demographic characteristics of the study group (n= 5,461 premature infants); and outcomes. IQR, interquartile range; S.D., standard deviation.
| Characteristic | n (%) |
|---|---|
| Gender (male) | 3097 (57%) |
| Ethnicity | |
| Caucasian | 4401 (81%) |
| Hispanic | 590 (11%) |
| Pacific-Islander | 48 (0.88%) |
| African-American | 32 (0.59%) |
| Native American | 18 (0.33%) |
| Asian | 67 (1.2%) |
| Unknown/Other | 298 (5.5%) |
| Multiple gestation | 1469 (27%) |
| Deaths | 145 (2.7%) |
| Antenatal magnesium | 1430 (26%) |
| Antenatal steroids | 1680 (31%) |
| Gestational age (weeks) | |
| Median (S.D.; IQR) | 33.3 (3.3; 30.7–35.0) |
| Birth weight (g) | |
| Median (S.D.; IQR) | 1973 (695; 1459–2422) |
| Apgar Score at 5 minutes | |
| Median (S.D.; IQR) | 8 (1.4; 8–9) |
| Neonatal infection | 2044 (37%) |
| Vasopressor requirement | 482 (8.8%) |
| Intraventricular hemorrhage | 410 (7.5%) |
| Outcomes | |
| Combined Epilepsy and Motor Impairment | 98 (1.8%) |
| Epilepsy | 70 (1.3%) |
| Motor Impairment | 84 (1.5%) |