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Table 1: 
Descriptive characteristics of the cohort (N = 78)
PT without BI (n = 31)PT with BI (n = 47)P Valuea
Birth GA (wk)b28.2 ± 2.6 (22.9–32.0)26.5 ± 2.6 (23.0–32.6).007
Birth weight (kg)b1.1 ± 0.3 (0.4–1.5)0.9 ± 0.3 (0.4–1.5).04
Days of life at MRIb41.2 ± 17.6 (10.0–84.0)49.1 ± 18.9 (15.0–93.0).07
Apgar score at 1 minc6 (4, 2–9)4 (4, 1–9).003
Apgar score at 5 minc8 (3, 4–9)7 (3, 3–9).005
Postmenstrual age at MRI (wk)b34.0 ± 1.9 (30.9–36.9)33.5 ± 2.19 (28.4–37.0).37
Weight at MRI (kg)b1.7 ± 0.4 (0.8–2.7)1.6 ± 0.5 (0.8–3.0).37
Female (No.) (%)17 (54.8)25 (53.2).89
Cesarean delivery (No.) (%)23 (74.2)28 (59.6).18
  • ↵a P value based on a t test for normally distributed continuous variables, the Wilcoxon-Mann-Whitney test for nonparametric continuous outcomes, and the χ2 test for categoric outcomes.
  • ↵b Mean (range).
  • ↵c Median (interquartile range, range).