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  • Title: Improved survival and neurodevelopmental outcomes among extremely premature infants born near the limit of viability.
    Author: Younge N, Smith PB, Gustafson KE, Malcolm W, Ashley P, Cotten CM, Goldberg RN, Goldstein RF.
    Journal: Early Hum Dev; 2016 Apr; 95():5-8. PubMed ID: 26900775.
    Abstract:
    BACKGROUND: Infants born near the limit of viability are at high risk for death or adverse neurodevelopmental outcomes. It is unclear whether these outcomes have improved over the past 15 years. AIM: To determine if death and neurodevelopmental impairment have declined over the past 15 years in infants born at 22 to 24 weeks' gestation. STUDY DESIGN: Retrospective cohort study. SUBJECTS: We identified infants born at 22 to 24 weeks' gestation in our center in two epochs: 1998-2004 (Epoch 1) and 2005-2011 (Epoch 2). OUTCOME MEASURES: The primary outcome, death or neurodevelopmental impairment, was evaluated at 17-25 months' corrected gestational age with neurologic exams and Bayley Scales of Infant Development. Perinatal characteristics, major morbidities, and outcomes were compared between epochs. RESULTS: Birth weight and gestational age were similar between 170 infants in Epoch 1 and 187 infants in Epoch 2. Mortality was significantly lower in Epoch 2, 55% vs. 42% (p=0.02). Among surviving infants, late-onset sepsis (p<0.01), bronchopulmonary dysplasia (p<0.01), and surgical necrotizing enterocolitis (p=0.04) were less common in Epoch 2. Neurodevelopmental impairment among surviving infants declined from 68% in Epoch 1 to 47% in Epoch 2, p=0.02. Odds of death or NDI were significantly lower in Epoch 2 vs. Epoch 1, OR=0.31 (95% confidence interval; 0.16, 0.58). CONCLUSION: Risk of death or neurodevelopmental impairment decreased over time in infants born at 22 to 24 weeks' gestation.
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