However, rhEPO treatment significantly decreased the incidence of all stages NEC in preterm infants with Hb < 90 g/l (p < 0.0001, interaction p = 0.006) and with 5 min Apgar score > 5 (p = 0.028, interaction p = 0.012) (Table 4). This evidence concerns the gene GSTM1 and necrotizing enterocolitis.