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Original Research Paper

Risk factors for necrotising enterocolitis in an HIV-endemic region

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Pages 208-215 | Received 26 Sep 2013, Accepted 18 Apr 2014, Published online: 07 May 2014
 

Abstract

Background:

Several risk factors have been implicated in the development of necrotising enterocolitis (NEC). However, little has been reported on the risk factors for NEC in infants born in a setting where exposure to maternal human immunodeficiency virus (HIV) is prevalent.

Objectives:

To determine maternal and infant characteristics associated with NEC in a setting with a high prevalence of HIV infection and to compare clinical presentation and mortality of NEC in HIV-exposed and unexposed infants.

Methods:

This was a retrospective, case-control study. Infants with a confirmed diagnosis of NEC, admitted between January 2005 and December 2008 were identified as cases. Two controls for each case were selected by matching them for birthweight, gestational age and date of birth. Hospital records were reviewed for maternal and infant characteristics.

Results:

One hundred and ten infants with confirmed NEC were identified and 220 were selected as controls. Median birthweight and gestational age were similar between cases and controls, (1370 and 1380 g, P = 0·96, and 31 weeks each, P = 0·62, respectively). Lack of use of antenatal corticosteroids (ANS) (OR 2·77, 95% CI 1·42–5·38, P = 0·003), presence of chorio-amnionitis (OR 7·28, 95% CI 2·16–24·51, P = 0·001) and not mechanically ventilated at birth (OR 3·54, 95% CI 1·29–9·69, P = 0·01) were independently associated with NEC. Maternal HIV status was not associated with NEC. Clinical presentation and mortality from NEC were similar between HIV-exposed and unexposed infants.

Conclusions:

Infants who develop NEC were less likely to have received mechanical ventilation at birth, suggesting that they were less critically ill when born. Use of ANS should be encouraged as it is protective against NEC. Infants born to HIV-infected mothers were not at increased risk of NEC.

Acknowledgment

We thank Jimmy Akii for valuable advice in analysing the data.

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