Trends in incidence and outcomes of necrotizing enterocolitis over the last 12 years: A multicenter cohort analysis

Abstract

ObjectiveWe sought to describe changes in the incidence and mortality of necrotizing enterocolitis (NEC) and associated surgical management strategies for very low birth weight (VLBW) infants. MethodsData were prospectively collected on VLBW infants (≤1500 g or < 29 weeks) born 2006 to 2017 and admitted to 820 U.S. centers. NEC was defined by the presence of at least one clinical and one radiographic finding. Trends analyses were performed to assess changes in incidence and mortality over time. ResultsOf 473,895 VLBW infants, 36,130 (7.6%) were diagnosed with NEC, of which 21,051 (58.3%) had medical NEC and 15,079 (41.7%) had surgical NEC. Medical NEC decreased from 5.3% to 3.0% (p < 0.0001). Surgical NEC decreased from 3.4% to 3.1% (p = 0.06). Medical NEC mortality decreased from 20.7% to 16.8% (p = 0.003), while surgical NEC mortality decreased from 36.6% to 31.6% (p < 0.0001). In the surgical cohort, the use of primary peritoneal drainage (PPD) versus initial laparotomy rose from 23.2% to 46.8%. ConclusionThe incidence and mortality of both medical and surgical NEC have decreased over time. Changes in surgical management during this time period included the increased utilization of primary peritoneal drainage. Type of studyPrognosis study. Level of evidenceLevel II.