Table 1

 Inclusion criteria for studies

Criteria
RCT, randomised controlled trial; NEC, necrotizing enterocolitis.
PublicationLanguageAny
Date1951–2005
TypeOriginal research, not reviews
StudyTypeAll (retrospective/prospective/RCT/cohort study)
Patients includedDate of birth>1975
Birthweight⩽1500 g
GestationAny
Follow-upAt least 1 year
ComparisonsNEC with no NECMedical NEC with surgical NEC