Table 1:

Descriptive characteristics of the cohort (N = 78)

	PT without BI (n = 31)	PT with BI (n = 47)	P Value^{^a}
Birth GA (wk)^{^b}	28.2 ± 2.6 (22.9–32.0)	26.5 ± 2.6 (23.0–32.6)	.007
Birth weight (kg)^{^b}	1.1 ± 0.3 (0.4–1.5)	0.9 ± 0.3 (0.4–1.5)	.04
Days of life at MRI^{^b}	41.2 ± 17.6 (10.0–84.0)	49.1 ± 18.9 (15.0–93.0)	.07
Apgar score at 1 min^{^c}	6 (4, 2–9)	4 (4, 1–9)	.003
Apgar score at 5 min^{^c}	8 (3, 4–9)	7 (3, 3–9)	.005
Postmenstrual age at MRI (wk)^{^b}	34.0 ± 1.9 (30.9–36.9)	33.5 ± 2.19 (28.4–37.0)	.37
Weight at MRI (kg)^{^b}	1.7 ± 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).