Table 1

 Infant characteristics on study entry (group medians are shown with percentages or interquartile ranges in brackets)

IncubatorRadiant warmerp Value
Number3032
Birth weight (g)870(751–1031)902(746–991)0.98
Gestation (weeks)26(24.9–27)26(25–27)0.78
SGA (<10th centile)1(3.3)5(15.6)0.2
Male (%)17(57)19(59)1.0
1 min Apgar <4 (%)10(33)10(31)1.0
5 min Apgar <6 (%)8(27)6(19)0.55
Complete antenatal steroids (%)16(53)22(69)0.3
Cesaerean delivery (%)14(53)15(53)1.0
Intubation at birth (%)16(53)10(31)0.12
CRIB II score12(10–14)12(10–14)0.84