. Author manuscript; available in PMC: 2016 May 18.

Published in final edited form as: Pediatr Res. 2015 Nov 16;79(3):453–459. doi: 10.1038/pr.2015.238

Table 1. Descriptive statistics of sample.

	Sample (n=62)
Gestational age at birth, mean ± SD, weeks	25.4 ± 1.3
Birth weight, mean ± SD, grams	833 ± 199
Male sex, n (%)	42 (67)
Race
White, n (%)	32 (52)
African-American, n (%)	30 (48)
SGA, n (%)	5 (8)
Antenatal steroids
None, n (%)	15 (24)
Partial course, n (%)	19 (31)
Complete course, n (%)	28 (45)
Chorioamnionitis^b, n (%)	22 (35)
Antenatal magnesium sulfate exposure, n (%)	28 (45)
Adequate prenatal care^a, n (%)	46 (74)
Vaginal delivery, n (%)	25 (40)
Delayed cord clamping, n (%)	9 (15)
Mechanical ventilation at 72h, n (%)	45 (73)
Dopamineexposure, n (%)	17 (27)
Fentanylexposure, n (%)	22 (35)
IVH
All grades, n (%)	23 (39)
Grade III-IV, n (%)	6 (10)
Died in the neonatal period, n (%)	6 (10)

Defined as receiving at least 75% of expected visits at time of birth (27,28).

Based on histologic examination of the placenta.