Table 1.
Perinatal characteristics of the study group.
| Perinatal clinical characteristic | All subjects | Male subjects n = 28 | Female subjects n = 22 | p-Value |
|---|---|---|---|---|
| Median (range) gestational age at birth (weeks) | 30.4 (24.0–32.9) | 29.9 (24.3–32.7) | 30.0 (24.0–32.9) | 0.3880 |
| Median (range) postmenstrual age at scan (weeks) | 42.1 (38.6–47.1) | 42.1 (38.6–46.1) | 41.6 (39.4–47.1) | 0.8866 |
| Median (range) birthweight (grams) | 1202.5 (645–1990) | 1215 (645–1990) | 1130 (669–1960) | 0.8044 |
| Mean (SD) birthweight z-scores | −0.71 (0.876) | −0.72 (1.0) | −0.69 (0.70 | 0.9473 |
| Median (range) days of ventilation | 0 (0–40) | 0 (0−30) | 0 (0–40) | 1 |
| Median (range) days of total parenteral nutrition | 6.5 (0–89) | 6 (0–24) | 6 (0–89) | 0.9371 |
| Rate of weight gain (grams per week) | 164 (11–276) | 166 (94–276) | 146 (11–229) | 0.5694 |
| NEC requiring surgery (no, %) | 1 (2%) | 0 (0%) | 1 (4.5%) | – |
| Chorioamnionitis (no., %) | 2 (4%) | 1 (3.6%) | 1 (4.5%) | – |
| PDA requiring medical or surgical treatment (no., %) | 1 (2%) | 1 (3.6%) | 0 (0%) | – |