Table 4 Demographics of enrolled PROP multicenter cohort
|  | Enrolled a (N = 835) |
|---|---|
Birth weight, grams (mean +/− SD) | 900 +/− 240 |
Gestational age, weeks (mean +/− SD) | 26.6 +/− 1.5 |
- 23 weeks, 0–6 days | 34 (4%) |
- 24 weeks, 0–6 days | 108 (13%) |
- 25 weeks, 0–6 days | 129 (15%) |
- 26 weeks, 0–6 days | 170 (20%) |
- 27 weeks, 0–6 days | 201 (24%) |
- 28 weeks, 0–6 days | 193 (23%) |
Multiple gestation | 210 (25.1%) |
- Twins | 171 (81%) |
- Triplets | 35 (17%) |
- Quadruplets | 4 (2%) |
Male | 427 (51%) |
Race b | Â |
- Caucasian | 486 (58.2%) |
- African American | 307 (36.8%) |
- N. American Indian/Native Alaskan | 1 (0.1%) |
- Asian | 20 (2.4%) |
- Native Hawaiian/other Pacific islander | 1 (0.1%) |
- Multi-race | 15 (1.8%) |
- Other | 5 (0.6%) |
Ethnicity b | Â |
- Hispanic/Latino | 92 (11%) |
Inborn | 728 (87.2%) |
Outborn | 105 (12.6%) |