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Poverty and InequalitySexual and Reproductive HealthFamily, Maternal & Child HealthMethodology

Associations of prenatal and childhood antibiotic use with child body mass index at age 3 years

TitleAssociations of prenatal and childhood antibiotic use with child body mass index at age 3 years
Publication TypeJournal Article
Year of Publication2017
AuthorsPoulsen, MN, Pollak, J, Bailey-Davis, L, Hirsch, AG, Glass, TA, Schwartz, BS
JournalObesity (Silver Spring)
Volume25
Pagination438-444
Date PublishedFeb
ISBN Number1930-7381
Accession Number28124504
Abstract

OBJECTIVE: Early-life antibiotic exposure, whether through prenatal or childhood antibiotic use, may contribute to increased child body mass. Associations of prenatal and childhood antibiotic use with body mass index z-score (BMIz) were evaluated at age 3 years. METHODS: Electronic health records were utilized from 8,793 mothers and singleton children delivered at Geisinger Clinic in Pennsylvania between 2006 and 2012. Antibiotic orders were ascertained for mothers during pregnancy and for children through their age-3 BMI measurement. Linear mixed-effects regression models evaluated associations of prenatal and childhood antibiotic use with child BMIz. RESULTS: Prenatal antibiotic orders were not associated with child BMIz. Children in the three largest categories of lifetime antibiotic orders had higher BMIz compared with children with no orders; associations persisted when controlling for prenatal antibiotics (beta [95% confidence interval]) (4-5 child orders: 0.090 [0.011 to 0.170]; 6 to 8: 0.113 [0.029 to 0.197]; >/=9: 0.175 [0.088 to 0.263]; trend P value <0.001). Two or more first-year orders were also associated with BMIz (1: 0.021 [-0.038 to 0.081]; 2: 0.088 [0.017 to 0.160]; >/=3: 0.104 [0.038 to 0.170]; trend P value < 0.001). CONCLUSIONS: Associations of early-life and lifetime childhood antibiotic use with increased child BMI highlight antibiotic exposure as a modifiable factor for reducing population-level excess weight.

PMCID

PMC5301467