Table 2.

Late onset of pulmonary hypertension

	Negative Screen; Positive in Follow-Up (n = 27)	Negative Screen; Negative in Follow-Up (n = 133)	P Value
Sex, % female	40.7	42.1	0.90
Race/ethnicity, % non-White	59.3	62.4	0.76
Gestational age, mean ± SD (range), wk	25.7 ± 2.1 (23.1–32)	26.4 ± 2.2 (22.7–32)	0.14
Birthweight, mean ± SD (range), grams	787 ± 277 (470–1,590)	880 ± 332 (400–2,310)	0.17
Birthweight percentile, mean ± SD (range), %	41 ± 25 (4–89)	44 ± 25 (1–95)	0.70
G-tube, % yes	66.7	33.8	0.001
Nissen fundoplication, % yes	44.4	19.6	0.006
Supplemental oxygen at discharge, % yes	74.1	40.6	0.001
Initial oxygen amount, mean ± SD (range), LPM	0.48 ± 0.24 (0.13–1.00) (n = 20)	0.32 ± 0.23 (0.03–1.00) (n = 54)	0.010
Age at home oxygen discontinuation, median (95% CI), yr	1.31 (1.06–2.10) (n = 20)	0.81 (0.70–1.00) (n = 54)	0.034*
Diuretics, % yes	88.9	72.2	0.07
Tracheostomy, % yes	7.4	3.0	0.27
Home ventilator, % yes	7.4	3.0	0.27
PDA requiring procedure, % yes	48.2	27.1	0.030
CSF shunt, % yes	11.1	12.0	0.89
Initial length of stay, mean ± SD (range), d	211 ± 80 (95–452)	139 ± 63 (49–507)	<0.001

Definition of abbreviations: CI = confidence interval; CSF = cerebrospinal fluid; LPM = liters per minute; PDA = patent ductus arteriosus; SD = standard deviation.

^*P value generated via Wilcoxon rank-sum test.