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Demographic and clinical characteristics of the study population
| Characteristics | Value | |
|---|---|---|
| Gestational age in weeks (m, sd) | 31.9 | 4.1 |
| Male gender (n, %) | 313 | 52.2 |
| Birth weight in grams (m, sd) | 1779 | 885 |
| Length of NICU stay in days (median, range) | 14 | 1–278 |
| Death (n, %) | 76 | 12.7 |
m mean, sd standard deviation
