Genevieve L Taylor1, Robert M Joseph2, Karl C K Kuban3, Laurie M Douglass3, Jeff Laux4, Bree Andrews5, Rebecca C Fry6,7, Wayne A Price7, Thomas M O'Shea7. 1. Department of Pediatrics, and gtaylor@med.unc.edu. 2. Department of Anatomy and Neurobiology, School of Medicine, Boston University, Boston, Massachusetts. 3. Departments of Pediatrics and Neurology, Boston Medical Center, Boston, Massachusetts; and. 4. The North Carolina Translational and Clinical Sciences Institute, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina. 5. The University of Chicago Comer Children's Hospital, Chicago, Illinois. 6. Department of Environmental Sciences and Engineering, Gillings School of Global Public Health. 7. Department of Pediatrics, and.
Abstract
OBJECTIVES: Evidence-based care of extremely preterm infants (<28 weeks' gestation) depends heavily on research in which a primary outcome is infant neurodevelopmental impairment (NDI), yet it is unclear how well NDI in infancy predicts long-term NDI. In this study, we aim to assess the relationship between 2- and 10-year neurodevelopment using a well-known 2-year definition and a 10-year definition developed by an expert panel. METHODS: Using data from the Extremely Low Gestational Age Newborn Study cohort, we classified 2-year NDI using definitions developed by the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network. We classified 10-year NDI using definitions developed by an expert panel, which added epilepsy and ASD at 10 years. RESULTS: Of 1506 infants, 80% survived. Data sufficient to classify severity of NDI at both 2 and 10 years were available for 67% of survivors (n = 802). Among children classified as having moderate to severe NDI at 2 years, 63% had none to mild NDI at 10 years; among children classified as having profound NDI at 2 years, 36% had none to mild NDI at 10 years. Cohen's κ statistic indicated minimal to fair agreement between NDI at 2 and 10 years (0.34, P < .001). CONCLUSIONS: NDI in infancy, as defined in this study, only weakly predicts NDI in middle childhood. For the parents at risk for delivery of an extremely preterm infant, a hopeful message can be taken from our findings that one-third of surviving children classified as having profound NDI and nearly two-thirds of those classified as having moderate to severe NDI at 2 years had none to mild NDI at 10 years.
OBJECTIVES: Evidence-based care of extremely preterm infants (<28 weeks' gestation) depends heavily on research in which a primary outcome is infant neurodevelopmental impairment (NDI), yet it is unclear how well NDI in infancy predicts long-term NDI. In this study, we aim to assess the relationship between 2- and 10-year neurodevelopment using a well-known 2-year definition and a 10-year definition developed by an expert panel. METHODS: Using data from the Extremely Low Gestational Age Newborn Study cohort, we classified 2-year NDI using definitions developed by the Eunice Kennedy Shriver National Institute of Child Health and Human Development Neonatal Research Network. We classified 10-year NDI using definitions developed by an expert panel, which added epilepsy and ASD at 10 years. RESULTS: Of 1506 infants, 80% survived. Data sufficient to classify severity of NDI at both 2 and 10 years were available for 67% of survivors (n = 802). Among children classified as having moderate to severe NDI at 2 years, 63% had none to mild NDI at 10 years; among children classified as having profound NDI at 2 years, 36% had none to mild NDI at 10 years. Cohen's κ statistic indicated minimal to fair agreement between NDI at 2 and 10 years (0.34, P < .001). CONCLUSIONS: NDI in infancy, as defined in this study, only weakly predicts NDI in middle childhood. For the parents at risk for delivery of an extremely preterm infant, a hopeful message can be taken from our findings that one-third of surviving children classified as having profound NDI and nearly two-thirds of those classified as having moderate to severe NDI at 2 years had none to mild NDI at 10 years.
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