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Table 1 Characteristics of normothermic and hypothermic VLBW infants

From: Association between admission hypothermia and outcomes in very low birth weight infants in China: a multicentre prospective study

  Moderate/severe hypothermia
n = 546
Mild hypothermia
n = 554
Normothermia
n = 147
P*
GA [weeks, M (Q1,Q3)] 29 (28, 31) 30 (28, 31) 30 (28, 31) 0.048
BW [g, M (Q1,Q3)] 1230 (1050, 1370) 1280 (1100, 1400) 1280 (1130, 1430) 0.001
SGA 144 (26.4) 127 (22.9) 23 (15.6) 0.022
Sex (boy) 287 (52.6) 282 (50.9) 80 (54.4) 0.711
Caesarean section 425 (77.8) 398 (71.8) 73 (49.7) < 0.001
Multiple birth (twins or more) 104 (19.0) 111 (20.0) 22 (14.9) 0.379
Antenatal use of full course of steroid 270 (49.5) 234 (42.2) 43 (29.3) < 0.001
Apgar score at 1 min < 7 212 (38.9) 193 (34.8) 42 (28.6) 0.057
Apgar score at 5 min < 7 208 (38.1) 148 (26.7) 16 (10.9) < 0.001
Intubation at DR 215 (39.4) 157 (28.3) 15 (10.2) < 0.001
Maternal hypertension 248 (45.4) 227 (40.9) 41 (27.9) 0.001
GDM 64 (11.7) 65 (11.7) 18 (12.2) 0.983
PROM 236 (43.2) 193 (34.8) 52 (35.4) 0.023
Death 93 (17.0) 40 (7.2) 5 (3.4) < 0.001
RDS 453 (82.9) 404 (72.9) 70 (47.6) < 0.001
BPD 77 (14.1) 75 (13.5) 18 (12.2) 0.191
IVH 86 (15.7) 35 (6.3) 4 (2.7) < 0.001
NEC 31 (5.6) 17 (3.1) 5 (3.4) 0.087
LOS 198 (36.3) 170 (30.7) 32 (21.7) 0.002
ROP 44 (8.1) 42 (7.6) 13 (8.8) 0.873
EUGR 301 (55.1) 271 (48.9) 63 (42.8) 0.014
  1. Data are presented as the median or n (%)
  2. Abbreviations: GA Gestational age, BW Birth weight, SGA Small for gestational age, PROM Premature rupture of membranes, DR Delivery room, GDM Gestational diabetes mellitus, RDS Respiratory distress syndrome, BPD Bronchopulmonary dysplasia, IVH Intraventricular haemorrhage, NEC Necrotizing enterocolitis, LOS Late-onset neonatal sepsis, ROP Retinopathy of prematurity, EUGR Extrauterine growth retardation
  3. * Kruskal-Wallis or chi-square test