Risk of neurodevelopmental impairment for outborn extremely preterm infants in an Australian regional network

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Abstract

Objective: To compare neurodevelopmental outcomes at 2-3 years in extremely premature outborn and inborn infants.Design: Population-based retrospective cohort study.Setting: Geographically defined area of New South Wales (NSW) and the Australian Capital Territory (ACT) served by a network of 10 neonatal intensive care units (NICUs).Patients: All premature infants <29 weeks gestation born between 1998 and 2004 in the setting.Intervention: At 2-3 years, corrected age, 1473 children were assessed with either the Griffiths Mental Developmental Scales (GMDS) or the Bayley Scales of Infant Development (BSID-II).Main outcome measure: Moderate/severe functional disability (FD) defined as: developmental delay (GMDS general quotient (GQ) or BSID-II mental developmental index (MDI)) >2 standard deviations (SD) below the mean; cerebral palsy (CP) requiring aids; sensorineural or conductive deafness (requiring amplification); or bilateral blindness (visual acuity <6/60 in better eye).Results: At 2-3 years, moderate/severe functional disability does not appear to be significantly different between outborn and inborn infants (adjusted OR 0.782; 95% CI 0.424-1.443). However, there were a significant number of outborn infants lost to follow up (23.3% versus 42.9%).Conclusion: In this cohort, at 2-3 years follow up neurodevelopmental outcome does not appear to be significantly different between outborn and inborn infants. These results should be interpreted with caution given the limitation of this study.
Original languageEnglish
Pages (from-to)96-102
Number of pages7
JournalJournal of Maternal-Fetal and Neonatal Medicine
Volume30
Issue number1
DOIs
Publication statusPublished - Jan 2017

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