ABSTRACT
We sought to determine the association between small for gestational age (SGA), birth weight, and childhood obesity within preterm polysubstance exposed children. We sampled 312 preterm children with 11-year body mass index (BMI; age- and sex-specific) data from the Maternal Lifestyle Study (51% girls, 21.5% SGA, 46% prenatal cocaine, and 55% tobacco exposed). Multinomial regression analyzed the association between 11-year obesity (OBE) and overweight (OW) and SGA, birth weight, first-year growth velocity, diet, and physical activity variables. Overall, 24% were OBE (BMI for age ≥95th percentile) and 16.7% were OW (BMI ≥85th and <95th percentiles). In adjusted analyses, SGA was associated with OW (odds ratio [OR] = 3.4, confidence interval [CI] 1.5 to 7.5). Higher birth weight was associated with OBE (OR = 1.8, CI 1.3 to 2.4) and OW (OR = 1.4, CI 1.1 to 2.0). Growth velocity was associated with OBE (OR = 2.7, CI 1.8 to 4.0) and OW (OR = 1.6, CI 1.1 to 2.4). Low exercise was associated with OBE (OR = 2.1, CI 1.0 to 4.4) and OW (OR = 2.1, CI 1.0 to 4.5). There was no effect of substance exposure on obesity outcomes. Many (41%) of these high-risk preterm 11-year-olds were obese/overweight. Multiple growth-related processes may be involved in obesity risk for preterm children, including fetal programming as indicated by the SGA effect.
KEYWORDS
Childhood obesity - premature birth - infant SGA - birth weight - exercise - prenatal drug exposure
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Ronnesia B GaskinsPh.D. M.S.P.H.
Brown Center for the Study of Children at Risk, Brown-Alpert Medical School
Women & Infants Hospital of RI, 101 Dudley St., Providence, RI 02905
eMail: Ronnesia_Gaskins@brown.edu