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Table 1 Clinical characteristics by bronchopulmonary dysplasia status

From: Neonatal hematological parameters and the risk of moderate-severe bronchopulmonary dysplasia in extremely premature infants

Variable Infants without BPD (n = 55) Infants with moderate or severe BPD (n = 60) P value
maternal age, yr 32 (29–36) 32 (29–34) 0.406
conception by ART 4 (7%) 16 (27%) 0.006
GDM 3 (6%) 4 (7%) 0.786
gestational hypertension 9 (16%) 3 (5%) 0.046
PPROM 13 (24%) 24 (40%) 0.061
chorioamnionitis 6 (11%) 2 (3%) 0.015
Intubation at resuscitation 25 (45%) 53 (88%) < 0.001
antenatal steroid treatment 37 (67%) 49 (82%) 0.076
cesarean section delivery 25 (46%) 10 (17%) 0.001
gestational age at birth, wk 27.3 (26.1–28.6) 25.8 (24.5–26.8) < 0.001
birth weight, gr 890 (740–980) 770 (687–910) 0.039
SGA 18 (33%) 5 (8%) 0.001
male 26 (47%) 39 (65%) 0.055
NRDS 43 (78%) 54 (90%) 0.081
Mechanical ventilation 22 (40%) 51 (85%) < 0.001
(Suspected) Early-onset neonatal sepsis 9 (16%) 26 (43%) 0.002
Apgar score at 1 min 7 (5–9) 5 (5–8) 0.041
Apgar score at 5 min 10 (9–10) 10 (8–10) 0.133
surfactant treatment 32 (59%) 53 (88%) < 0.001
PDA 10 (18%) 35 (58%) < 0.001
IVH grade 3 or 4 5 (9%) 9 (15%) 0.333
NEC 2 (4%) 3 (5%) 0.541
pneumothorax 1 (2%) 1 (2%) 0.950
pulmonary hemorrhage 2 (4%) 4 (7%) 0.681
  1. Data were displayed as median (interquartile range) or number (percentage). ART assisted reproductive technology, GDM gestational diabetes mellitus, PPROM preterm premature rupture of the membranes, SGA small for gestational age, NRDS neonatal respiratory distress syndrome, PDA patent ductus arteriosus, IVH intraventricular hemorrhage, NEC necrotizing enterocolitis
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