Session: SAT 677-696-Obesity Physiology & Epidemiology
Poster Board SAT-691
Methods: A retrospective study was conducted using data from 20,321 teens aged 18-19 years with BMI measured during 2007-2012. Demographic factors were ascertained using health plan databases. Outcome measures included BMI percentile using pediatric criteria for underweight (<5th percentile), normal weight (5th - <85th percentile), overweight (85th - <95th percentile), obesity (>=95th percentile) and severe/extreme obesity (BMI >=120% of the 95th BMI percentile), and absolute BMI (kg/m2) using adult criteria for underweight (BMI <18.5), normal weight (BMI 18.5 - 24.9), overweight (BMI 25 - 29.9), class I obesity (BMI 30 - 34.9), class II obesity (BMI 35 - 39.9) and extreme (class III) obesity (BMI >=40). Concordance between pediatric and adult BMI classification was also examined across the four primary weight categories using the Kappa statistic.
Results: Comparing pediatric percentile criteria to adult criteria (pediatric / adult), 15.8% / 21.6% were overweight, 14.2% / 14.2% were obese and 4.9% / 2.3% were extremely obese. The prevalence of obesity was highest in Hispanics followed by blacks among boys, and blacks followed by Hispanics among girls, regardless of criteria used. Concordance between pediatric and adult BMI classification for underweight, normal, overweight and obese categories was seen for nearly 90% of the cohort (weighted Kappa statistic 0.71, 95% CI 0.70-0.72). For higher order obesity, a BMI >=120% of the 95th BMI percentile approximated a BMI of >=35 for boys and BMI >=37 for girls.
Conclusions: This study shows that there is substantial agreement between pediatric and adult BMI categorization in 18-19 year old teens across underweight, normal weight, overweight and obese categories. These data support the use of adult BMI classification for teens aged 18-19 years, promoting adult-based identification and tracking of high BMI beginning with the transition to adult medical care.
Nothing to Disclose: BM, LCG, MC, SRD, AS, RP, MFD, EDP, KA, NES, EOK, KLM, DJM, PJO, JCL
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