Infants Born Large for Gestational Age and Developmental Attainment in Early Childhood

Objectives. To investigate if an association exists between being born large for gestational age (LGA) and verbal ability or externalizing behaviour problems at ages 4-5 years. Method. A secondary analysis was conducted using the National Longitudinal Survey of Children and Youth, including singleton births in 2004-2005 followed till 4-5 years . LGA was defined as a birth weight > 90th percentile. Outcomes included poor verbal ability (scoring 90th percentile on externalizing behaviour scales). Multivariable logistic regression with longitudinal standardized funnel weights and bootstrapping estimation were used. Results. Infants born LGA were not found to be at increased risk for poor verbal ability (aOR: 1.16 and aOR: 0.83 for girls and boys, resp.) or externalizing behaviour problems (aOR: 1.24 and aOR: 1.24 for girls and boys, resp.). Social factors were found to impact developmental attainment. Maternal smoking led to an increased risk for externalizing behaviour problems (aOR: 3.33 and aOR: 2.12 for girls and boys, resp.). Conclusion. There is no evidence to suggest that infants born LGA are at increased risk for poor verbal ability or externalizing behaviour problems.

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