Table 1

 Clinical details of study cohort divided into three groups according to gestation

Group AGroup BGroup C
Values in parentheses are 25th,75th centiles.
Group A, born at >37 weeks; group B, born at 32–36 weeks; group C, born at <32 weeks; SGA, small for gestational age, on or below the 9th centile for weight; AGA, appropriate size for gestational age, between 10th and 90th centile for weight; LGA, large for gestational age, above 90th centile for weight; PROM, prolonged rupture of membranes; SVD, spontaneous vertex delivery; TPN, total parenteral nutrition.
Number of infants622820
Median gestation (weeks)40 (38, 41)33 (32, 34)28 (26, 30)
Male:female37:2514:149:11
Median birth weight (g)3490 (3075, 3788)1890 (1590, 2310)1080 (920, 1280)
SGA492
AGA491717
LGA921
White572818
Asian401
Mixed race101
History of PROM111
Antenatal steroids0108
Twins091
Oligohydramnios130
SVD341010
Caesarean section16138
Forceps1131
Vaginal breech121
Breast2781
Formula2381
Breast and formula1293
TPN (± enteral feeds)01119