Table 1

Proportions of infants admitted to neonatal units born weighing 501–1500 g and gestational age in the NICORE Ireland group and VON from 2004 to 2007

NICORE Ireland 2004–7VON 2004–7χ2
N  =  2888 (%)N  =  191 422 (%)p Value
Gestational age, weeks
    <24138 (4.8)14143 (7.4)<0.01
    24–26628 (21.7)46921 (24.5)<0.01
    27–291108 (38.4)69325 (36.2)0.018
    30–32758 (26.2)48268 (25.2)0.21
    >32256 (8.9)12765 (6.7)<0.01
Birth weight, g
    <50169 (2.4)8031 (4.2)<0.01
    501–750436 (15.1)34694 (18.1)<0.01
    751–1000627 (21.7)42276 (22.1)0.6
    1001–1250788 (27.3)46692 (24.4)<0.01
    >1250969 (33.6)59706 (31.2)<0.01
  • NICORE, Neonatal Intensive Care Outcomes Research and Evaluation; VON, Vermont Oxford Neonatal Network.