Neurodevelopmental outcomes of neonates with medically and surgically treated necrotizing enterocolitis

Clare M Rees ¹, Agostino Pierro ² and Simon Eaton ^1*

¹ Institute of Child Health, United Kingdom
² Great Ormond Street Hospital for Children & Institute of Child Health, United Kingdom

^* To whom correspondence should be addressed. E-mail: s.eaton{at}ich.ucl.ac.uk.

Accepted 11 September 2006

Abstract

Objectives: 1) To characterise neurodevelopmental outcome of neonates with necrotizing enterocolitis (NEC); 2) to define whether NEC increases risk of neurodevelopmental impairment in very low birth weight neonates; 3) to investigate whether stage of disease or need for surgery increase risk of poor outcome.

Design: A systematic review was performed. Searches identified 182 relevant papers. Ten studies compared extremely low birth weight neonates with NEC to infants of similar age and gestation who did not develop NEC. Data are reported as odds ratios [95% confidence intervals, p values for test for overall effect] and compared by chi-2.

Results: 7843 children (821 with NEC) were included in the meta-analysis. Median follow-up was 20 months (range 12-156). Overall, 45% of children who had neonatal NEC were neurodevelopmentally impaired. Infants with NEC were significantly more likely than infants of similar age and gestation who did not develop NEC to be neurodevelopmentally impaired (1.6 [1.3-2.0], p=0.0001) including a higher risk of cerebral palsy (1.5 [1.2-2.0], p=0.001), visual (2.3 [1.0-5.1], p=0.04), cognitive (1.7 [1.4-2.2], p<0.0001) and psychomotor impairment (1.7 [1.3-2.2], p<0.0001). The odds ratio of neurodevelopmental impairment was also 2.3 times higher in neonates with Bell's Stage III disease or requiring surgery ([1.5-3.6], p=0.0001).

Conclusions: NEC is associated with significantly worse neurodevelopmental outcome than prematurity alone. Presence of advanced NEC and need for surgery increase the risk of neurological impairment.

Keywords: impairment, meta-analysis, necrotizing enterocolitis, neurodevelopment, outcome

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