Article,

Multivariate risks among extremely premature infants.

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J Perinatol, 14 (1): 41--47 (1994)

Abstract

This study was designed to identify risk factors for mortality and morbidity of extremely premature infants born in the surfactant era. The study cohort included 194 infants born at < 29 weeks' gestation at one regional tertiary center between 1983 and 1986. Forty-one infants died. Blinded neurodevelopmental assessments were performed on 149 of 153 (97\%) survivors at a mean age of 52 months. Thirty-one (21\%) survivors had major impairments: 15 had mental retardation, 8 had multiple impairments, 7 had cerebral palsy, and 1 was blind. Logistic regression analysis identifies five significant risk factors for mortality: grade III or IV intraventricular hemorrhage, birth weight < 800 gm, 5-minute Apgar score < or = 3, male sex, and absence of surfactant therapy. Significant risk factors for any major impairment included sepsis (relative risks RR = 6.4), male sex (RR = 3.1), and nonwhite race (RR = 2.8). Hydrocephalus requiring shunting was a significant risk factor for cerebral palsy (RR = 16.4) and neonatal retardation (RR = 16.0). Nonwhite race (RR = 7.3), sepsis (RR = 6.8), and male sex (RR = 3.7) also were significant risk factors for mental retardation. Confirmation of these risk factors should facilitate development of targeted interventions for optimizing long-term outcome.

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