Journal
PAEDIATRIC AND PERINATAL EPIDEMIOLOGY
Volume 32, Issue 3, Pages 268-280Publisher
WILEY
DOI: 10.1111/ppe.12468
Keywords
body size; catch up; head circumference; intrauterine growth restriction; neurodevelopmental disorders; prematurity
Funding
- Institut de Recherche en Sante Publique (IReSP) [HEUDE-AAP16-PREV-24]
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BackgroundClinicians' interest in the long-term effects of early postnatal growth (EPG) is growing. There is compelling evidence linking rapid EPG with later cardiovascular risk, but its neurodevelopmental benefits still remain hypothetical in individuals born moderately preterm (MP) or small for gestational at term (SGAT). MethodsThe objective was to perform a systematic review of the relationship between EPG before age 3years and neurodevelopmental outcome for individuals born MP (32-36weeks' gestational age) or SGAT. Following Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines, 3 independent investigators searched for articles published on this topic in the Web of Science, EMBASE and PubMed from database inception to July 1, 2017. A detailed quality scale was used to evaluate articles. ResultsWe selected 19 articles relying on 12 distinct study populations; 7 articles from 3 study populations were considered at moderate or high quality. The lack of standardisation of growth analysis methods prevented performing a meta-analysis. Overall, EPG was positively associated with neurodevelopmental outcome, especially Intelligence Quotient (IQ) when available. In this relationship, the first 6months of life might be a critical period. Analysis of the few articles investigating the shape of the relationships revealed a non-linear association, with a plateau for IQ with higher weight gain, which suggests a possible ceiling effect. ConclusionsA positive association was generally found between EPG and neurodevelopmental outcome for individuals born MP or SGAT. Strategies for future epidemiological studies are suggested to improve the characterisation of this relationship.
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