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* London School of Hygiene and Tropical Medicine, London, United Kingdom
Imperial College London, London, United Kingdom
Hospital Nacional E. Rebagliati, Lima, Peru
|| Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
¶ Hospital Enrique Sotomayor, Guayaquil, Ecuador
# Hospital Oftalmológico Santa Lucía, Buenos Aires, Argentina
** Instituto Fernandes Figueira Fiocruz, Rio de Janeiro, Brazil
Objective. Retinopathy of prematurity (ROP) is a potentially avoidable cause of blindness in children. The proportion of blindness as a result of ROP varies greatly among countries depending on their level of development, being influenced by the availability of neonatal care, neonatal outcomes, and whether effective screening and treatment programs are in place. The objective of this study was to compare characteristics of premature infants who developed severe ROP between 1996 and 2002 in highly developed countries with less developed countries.
Methods. This was an observational study. A questionnaire was completed by ophthalmologists in countries with low, moderate, and high development rankings (3 highly developed countries and from 10 less well-developed countries) who screen for ROP in which they supplied birth weights and gestational ages (GAs) of infants who were treated for threshold ROP or identified with more advanced stages of the disease. Birth weights and GAs of infants with severe ROP were measured.
Results. The mean birth weights of infants from highly developed countries ranged from 737 to 763 g compared with values ranging from 903 to 1527 g in less developed countries. Mean GAs of infants from highly developed countries ranged from 25.3 to 25.6 weeks compared with 26.3 to 33.5 weeks in less developed countries. A total of 13.0% of 1091 infants from poorly developed countries exceeded United Kingdom screening criteria; 3.6% exceeded a criteria of <34 weeks GA and/or <1750 g birth weight.
Conclusions. These findings suggest that larger, more mature infants are developing severe ROP in countries with low/moderate levels of development compared with highly developed countries. ROP screening programs need to use criteria that are appropriate for their local population.
Key Words: retinopathy of prematurity screening development index
Abbreviations: ROP, retinopathy of prematurity UNDP, United Nations Development Programme HDI, Human Development Index GA, gestational age
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