Evidence to modify guidelines for routine retinopathy of prematurity screening to avoid childhood blindness in middle-income countries

ObjectiveRetinopathy of prematurity (ROP), the leading cause of childhood blindness around the world, is potentially avoidable. The incidence of ROP varies between countries due to a variety of factors. The aim of this study is to assess the effectiveness of screening criteria in Mexico valid in March 2015 as an example of a middle-income country.MethodsThe medical records of 261 patients from a single center covering a period of 42 months (October 2011–March 2015) were retrospectively analyzed to identify infants with ROP that did not fall within screening criteria set forth by regional health authorities.ResultsOf the 261 infants in our study group, 55 (21.1%) weighed more than 1500g (ranging from 466 to 2910), 129 (49.4%) had a GA >30 weeks (ranging from 22 to 36), and 47 (18%) patients presented both. Overall, the mean birth weight for infants with ROP was 1270.6±365.3g. The mean gestational age was 30.4±2.3 weeks. Following actual AAO/AAP guidelines for ROP screening, 17 infants (6.5%) in our study group would have gone undiagnosed.ConclusionsThese findings show that the valid guidelines at the time of the screening were based on a different population and were not sufficient to detect all ROP cases in a middle-income country. With the update of the Mexican guidelines established in July 2015, the patients from this study would have been screened. Therefore, review and modification of the current screening guidelines in other middle-income countries should be considered to include all babies at risk for ROP