Postconceptional age at the treatment of retinopathy of prematurity in inborn and referred preterm infants from the same institution.

Purpose: The outcomes of the treatment of retinopathy of prematurity (ROP) seem to be better in inborn patients than in those patients who were referred for ROP treatment. This study aims to investigate the timing of treatment and the outcomes in inborn patients and in patients referred for treatment to the Hospital de Clínicas de Porto Alegre, Brazil.

Methods: An institutional prospective cohort study was conducted from 2002 to 2010 and included in group 1 all inborn preterm neonates treated for retinopathy of prematurity and in group 2 all babies referred for treatment to the same institution.

Maternal preeclampsia protects preterm infants against severe retinopathy of prematurity.

Objective: To study the influence of maternal preeclampsia on the occurrence of retinopathy of prematurity.

Study Design: A prospective cohort study of 324 preterm neonates with birth weight ≤ 1500 g and gestational age ≤ 32 weeks. Multiple maternal and perinatal factors were analyzed for association and confounding by multiple logistic regression analysis.

The influence of gestational age on the dynamic behavior of other risk factors associated with retinopathy of prematurity (ROP).

Background: Improved survival of preterm neonates has increased the incidence of retinopathy of prematurity (ROP) in many middle-income countries.

Aim: This study aimed to verify the main risk factors for the development of ROP according to different gestational age (GA) groups.

Methods: A prospective cohort study including infants weighing < or =1,500 g or GA < or =32 weeks at birth was conducted.