Abstract
Purpose: To determine whether being small for gestational age (SGA), appropriate for gestational age (AGA) and large for gestational age (LGA) affected the sensitivity and specificity of Postnatal Growth and Retinopathy of Prematurity (G-ROP) model. Methods: We applied the G-ROP criteria, except hydrocephalus, for prematures retrospectively. The infants were divided into three subgroups according to birth weight percentiles (SGA, AGA, LGA), and the performance of the G-ROP criteria was tested for each group by calculating sensitivity and specificity for any stage retinopathy of prematurity (ROP) and severe ROP. Severe ROP was defined as ROP needing treatment. Results: Three hundred and ninety neonates screened for ROP were included. The gestational age and birth weight of the neonates were 29.3±2.9 weeks and 1302.9±416 g, respectively. There were 41 (10.5%) SGA, 312 (80%) AGA and 37 (9.5%) LGA neonates. The sensitivity of the model for any ROP was 67.8%, 66.7%, 73.2%, 55.6% for all of the patients in the study, SGA, AGA, and LGA neonates, respectively. The sensitivity of the model for severe ROP in all group and for each subgroup was 100%. The specificity of the model for any ROP was 65.9%, 70.6%, 87.7%, 90% for all of the patients, SGA, AGA, and LGA neonates, respectively. The specificity for severe ROP was 46.4%, 50%, 44%, 63.6% for all of the patients, SGA, AGA, and LGA neonates, respectively.Conclusion: The sensitivity and specificity of the G-ROP model in SGA infants were similar with the whole group, but was different between SGA, AGA and LGA neonates. Although the model did not miss any severe ROP, the specificity of the model for severe ROP was found low.