RESUMO
INTRODUCTION: Retinopathy of prematurity (RoP) is a vasoproliferative disorder caused by the abnormal development of retinal vessels in premature neonates. It is one of the major causes of childhood blindness, which is increasing with the increasing survival rate of low birth weight and premature neonates. This study has aimed to evaluate the role of oxidative stress and peroxidant antioxidant balance (PAB) in the pathogenesis and prediction of RoP. MATERIALS AND METHODS: A total of 154 neonates weighing <1500 g admitted at the NICU of Ghaem Hospital, Mashhad, Iran, were enrolled in this cross-sectional study between 2018 and 2020. Blood samples were collected on the first day of birth to assess the peroxidant and antioxidant balance. The demographic, prenatal, and clinical course and postnatal problems were also recorded. The neonates were examined for RoP and divided into control (healthy) and affected (ROP) groups. RESULTS: There were significant differences between the two groups in gestational age, duration of oxygen therapy, and first and fifth minute Apgar score (P < 0.005). The mean PAB in infants without and with ROP was 19.79 HK (Hamidi-Koliakos) and 38.45 HK, respectively (P < 0.0001). Also, the mean PAB in neonates with ROP grade 1 and 2 was 36.69 HK and 45.53 HK, respectively (P = 0.002). CONCLUSION: According to our findings, the PAB level can be helpful in predicting ROP incidence. With increasing PAB, the possibility of ROP severity will increase.