occurred significantly more often in macrosomic than in non-macrosomic infants—27.4% (n = 20) v 4.7% (5) (relative risk 5.8, 2.3 to 14.7) and 75.4% (107) v 54.5% (91) (relative risk 1.4, 1.2
to 1.6). Hyperbilirubinaemia, respiratory disorders, hypertrophic cardiomyopathy, and asphyxia were significantly more common in preterm infants (all P < 0.005).