Incidence and risk factors of Retinopathy of Prematurity – a prospective observational study

Abstract

Objective Retinopathy of Prematurity (ROP) is a vasoproliferative retinopathy that affects the developing retinal vessels of premature infants. Identification of risk factors is essential for its early detection and intervention. The study was aimed to assess the incidence of ROP and to determine the risk factors associated with ROP. Methods It was a prospective observational study which included preterm neonates admitted in neonatal intensive care unit of a tertiary care hospital in Chennai,Tamil nadu,India from December 2020 to September 2021. Screening for ROP was performed for all neonates below 34 weeks gestation and between 34 to 36 weeks with risk factors for ROP. Association between risk factors and ROP was determined using chi square test for categorical variables and students t test for continuous variables. A p value less than 0.05 was considered significant. Results Of the 140 neonates screened, 45(32.1%) neonates were diagnosed to have ROP. Among the neonates detected to have ROP there were 24(53.3%) male. 34(75.6%) neonates had a birth weight less than 1.75 kg, 27(60%) neonates had a gestational age less than 34 weeks,22 (48.9%)neonates were born to primi mothers, 25(55.6%) neonates were delivered by normal vaginal delivery. Among the neonatal risk factors studied, sepsis was found to have a significant association with ROP (p=0.02). ). Risk factors like apnoea, respiratory distress syndrome, intraventricular hemorrhage, oxygen therapy and blood transfusion did not have a significant association with ROP. Conclusion The present study revealed an incidence of ROP of 32% and there was significant association with sepsis.