Table 1.
Characteristics of the study population (n=679).
| Characteristic | % |
|---|---|
| Postnatal age at death, days | |
| 4–15 | 51% |
| 16–30 | 30% |
| 31–60 | 14% |
| 61–120 | 5% |
| Gestational age at birth, weeks | |
| ≤24 | 36% |
| 25–28 | 43% |
| 29–32 | 14% |
| ≥33 | 8% |
| Birth weight, g | |
| <750 | 49% |
| 750–999 | 24% |
| 1001–1499 | 15% |
| ≥1500 | 12% |
| Small for gestational age | 18% |
| Male | 59% |
| Race/ethnicity | |
| Caucasian | 39% |
| African-American | 34% |
| Hispanic | 22% |
| Other | 5% |
| Co-morbidities | |
| Medical or surgical NEC | 27% |
| PDA requiring surgical ligation | 7% |
| Grade III or IV IVH, either side | 24% |
| Day of first positive culture | |
| −3 | 18% |
| −2 | 30% |
| −1 | 38% |
| 0 | 15% |
NEC, necrotizing enterocolitis; PDA, patent ductus arteriosus; IVH, intraventricular hemorrhage