title: Retinopathy of prematurity: screening and treatment in Costa Rica.
abstract: To determine the recent demographic data, risk factors and results of retinopathy of prematurity (ROP) screening and treatment in Costa Rica.
  
  
  
  The medical records of all preterm infants meeting ROP screening criteria (≤34 weeks' gestational age (GA) or birth weight (BW) ≤1750g, and those determined at risk by neonatologists) in the national healthcare system, Costa Rica, January 2010-December 2014, were retrospectively reviewed. The numbers and percentages of infants with ROP, risk factors, percentage of patients treated and treatment outcomes were determined. Comparison is made with screening criteria and literature reports of ROP incidence in other countries.
  
  
  
  The study population included 3018 preterm infants. Overall, 585 patients (585/3018, 19.4%) were found to have ROP. Of these, 15.4% (90 patients) required laser treatment, and 53% of those requiring treatment had BW <1000g. Five babies requiring treatment were ≥32 weeks' GA but with BW ≤1750g. Aggressive posterior disease was found in nine patients, and two infants of those screened (2/3018, 0.07%) suffered severe visual impairment during the 5-year study period.
  
  
  
  We provide comprehensive data of ROP care in Costa Rica allowing assessment and comparison of screening criteria and protocol.
authors.affiliation: National Children's Hospital of Dr Carlos Sáenz Herrera, San Jose, Costa Rica.
authors.forename: Ana Catalina
authors.initials: AC
authors.lastname: Tabarez-Carvajal
authors.affiliation: National Children's Hospital of Dr Carlos Sáenz Herrera, San Jose, Costa Rica.
authors.forename: Milagro
authors.initials: M
authors.lastname: Montes-Cantillo
authors.affiliation: Storm Eye Institute/Medical University of South Carolina Department of Ophthalmology, Charleston, South Carolina, USA.
authors.forename: Kelly H
authors.initials: KH
authors.lastname: Unkrich
authors.affiliation: Storm Eye Institute/Medical University of South Carolina Department of Ophthalmology, Charleston, South Carolina, USA.
authors.forename: Rupal H
authors.initials: RH
authors.lastname: Trivedi
authors.affiliation: Storm Eye Institute/Medical University of South Carolina Department of Ophthalmology, Charleston, South Carolina, USA.
authors.forename: Mae Millicent Winfrey
authors.identifier: 0000-0002-6104-9719
authors.initials: MMW
authors.lastname: Peterseim
mesh_terms: D003364:Costa Rica / Q000453:epidemiology; D019468:Disease Management; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D015997:Neonatal Screening / Q000379:methods*; D012178:Retinopathy of Prematurity / Q000175:diagnosis* / Q000453:epidemiology; D012189:Retrospective Studies; D012307:Risk Factors; D012720:Severity of Illness Index; D016896:Treatment Outcome
keywords: Child health (paediatrics); Retina