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Table 1 Demographic data, pregnancy and birth details mother and baby (up to one year following the birth)

From: Gastro-oesophageal reflux: a mixed methods study of infants admitted to hospital in the first 12 months following birth in NSW (2000–2011)

  With GORD
n = 9152
Without GORD
n = 860,036
P
Age of mothera 30.4 (5.50) 30.5 (5.60) .074
Primiparous 51.4% 41.7% < 0.000
Mother Australian born 83.0% 70.6% < 0.000
Gestation at booking visita 9.8 (5.42) 10.9 (6.52) < 0.000
Born in private hospital 30.5% 24.7% < 0.000
Any maternal hypertension 9.4% 6.6% < 0.000
Any maternal diabetes 5.4% 5.3% 0.587
Any maternal smoking 14.0% 13.6% 0.275
Any maternal psychiatric condition 35.0% 9.4% < 0.000
Multiple birth 8.7% 2.9% < 0.000
Non-cephalic presentation 8.5% 4.9% < 0.000
Labour induced 25.7% 25.1% 0.198
Gestation at birtha 37.9 (3.10) 39.0 (1.86) < 0.000
Premature (< 37 weeks gestation) 18.1% 6.4% < 0.000
Early term birth (37–38 weeks gestation) 27.5% 22.5% < 0.000
Birth type
Normal vaginal 50.8% 60.8% < 0.000
Instrumental 12.0% 10.8%  
Caesarean section 37.2% 28.4%  
APGAR 1a 8.1 (1.65) 8.4 (1.36) < 0.000
APGAR 5a 8.9 (0.92) 9.0 (0.73) < 0.000
Second APGAR< 7 2.9% 1.3% < 0.000
Birth weight (grams)a 3140 (768.0) 3391 (561.2) < 0.000
Birth weight < 3rd centile 2.3% 1.9% < 0.000
Admitted to SCN/NICU 29.9% 14.7% < 0.000
Required resuscitation (any type) 46.9% 36.8% < 0.000
Intubation of any form 3.6% 0.8% < 0.000
Male baby 54.6% 50.7% < 0.000
  1. Chi-square unless other indicated -a (mean and SD)