OBSTETRICS: NEWBORN MEDICINEAssociation of Early Postnatal Transfer and Birth Outside a Tertiary Hospital With Mortality and Severe Brain Injury in Extremely Preterm Infants Observational Cohort Study With Propensity Score MatchingHelenius, Kjell; Longford, Nicholas; Lehtonen, Liisa; Modi, Neena; Gale, Chris on behalf of the Neonatal Data Analysis Unit and the United Kingdom Neonatal CollaborativeAuthor Information Department of Paediatrics and Adolescent Medicine, Turku University Hospital (K.H., L.L.); Department of Clinical Medicine, University of Turku (K.H., L.L.), Turku, Finland; and Section of Neonatal Medicine, Department of Medicine, Chelsea and Westminster Campus, Imperial College London, London United Kingdom (K.H., N.L., N.M., C.G.) Obstetrical & Gynecological Survey: March 2020 - Volume 75 - Issue 3 - p 145-147 doi: 10.1097/01.ogx.0000657356.80705.4d Buy Metrics Abstract (Abstracted from BMJ 2019;367:l5678) Approximately 1 in 20 preterm infants in high-income countries are born at less than 28 weeks' gestation with increased risk of death and morbidity. Previous studies have shown improved outcomes when care is provided in tertiary hospitals as compared with nontertiary hospitals; this study aims to examine the rate of adverse outcomes for those preterm infants who underwent postnatal transfer to a tertiary facility in England. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.