ABO system incompatibility: evaluation of risk of hyperbilirubinaemia at birth by multivariate discriminant analysis.

A discriminant analysis was performed on a set of maternal and neonatal variables to predict at birth the serum bilirubin levels during the neonatal period in infants incompatible with their mothers in the ABO system. The results suggest that the rational and simultaneous utilization of clinical and laboratory parameters allows, a few hours after delivery, a useful classification of these infants in low or high risk for hyperbilirubinemia.