The readmission group also demonstrated a greater incidence of ABO hemolysis compared to controls: 14 out of 32 infants (43.8%) versus 94 out of 389 infants (24.2%), respectively (p = 0.015), as well as a higher incidence of glucose-6-phosphate dehydrogenase (G6PD) deficiency:12 out of 32 infants (37.5%) versus 83 out of 389 infants(21.3%), respectively(p = 0.036). This evidence concerns the gene G6PD and G6PD deficiency.