Table 4. Comparison of the demographic characteristics and morbidities of neonates with and without retinopathy of prematurity with gestational age 30-31 6/7 weeks. Of the 579 neonates, 16 died (mortality: 2.7 %) and 426 survived. Severe retinopathy was not detected in any neonate.

Values are presented as number of neonates (with percentage in brackets), or means ± standard deviation (median with range in brackets). ROP: retinopathy of prematurity, GA: gestational age, M: male, F: Female, CS: cesarean section, SGA: small for gestational age, IVH: intraventricular hemorrhage, RDS: respiratory distress syndrome, PVL: periventricular leukomalacia, PDA: patent ductus arteriosus, NEC: necrotizing enterocolitis, MV: mechanical ventilation, TPN: total parenteral nutrition