Diagnostic variability of extrauterine growth restriction between the Fenton-2013 and INTERGROWTH-21st criteria in preterm infants: a systematic review with meta-analysis

Introduction: Extrauterine growth restriction (EUGR) is considered an important parameter for clinical follow-up, with prognostic utility for adverse health outcomes in preterm infants. However, its use presents several challenges, mainly due to the lack of consensus regarding its definition and diagnostic criteria, which may lead to substantial variability in the estimation of its prevalence and affect clinical decision-making. The objective of this review is to compare the prevalence of EUGR estimated using the Fenton 2013 and INTERGROWTH-21st growth charts in preterm infants (