(Abstracted from JAMA 2019;321(12):1188–1199)
The long-term health outcomes for preterm infants have improved over time, but infants born at extreme preterm gestational ages continue to present issues of optimal antenatal and postnatal management, resource allocation and costs, quality of care, and long-term health outcomes. To better understand variations and time trends for management and outcomes of extremely preterm birth, study of international populations is needed.
Division of Pediatrics, Department of Clinical Science, Intervention, and Technology, Karolinska Institutet (M.N., B.H.); Department of Neonatal Medicine, Karolinska University Hospital (M.N., B.H.), Stockholm; Swedish Neonatal Quality Register, Umeå University Hospital, Umeå (M.N., S.H.); Departments of Clinical and Experimental Medicine and Pediatrics, Linköping University, Linköping (T.A., C.G.); Departments of Clinical Sciences and Pediatrics, Lund University and Skåne University Hospital, Lund (L.J.B., C.G., D.L.); Departments of Clinical Sciences and Pediatrics, Umeå University, Umeå (M.D., A.F., C.F.B., S.H.); Department of Women's and Children's Health, Uppsala University, Uppsala (L.H.-W., E.N., F.S.); Department of Pediatrics, Ryhov County Hospital, Jönköping County Council, Jonkoping (F.I.); Centre for Reproductive Epidemiology, Lund University (K.K.); Departments of Clinical Sciences and Obstetrics and Gynecology, Lund University, Skåne University Hospital (K.M.), Lund; Division of Clinical Epidemiology, Department of Medicine (O.S.) and Division of Obstetrics and Gynecology, Department of Women's and Children's Health (O.S.), Karolinska Institutet, Stockholm; Department of Pediatrics, Institute for Clinical Sciences, Queen Silvia Children's Hospital, Sahlgrenska Academy, Göteborg University, Göteborg (L.S.); Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm (P.U.-B.); and Sachs' Children and Youth Hospital, Department of Neonatal Medicine, Södersjukhuset, Stockholm (P.U.-B.), Sweden