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J Adolesc Health. 2011 Sep;49(3):330-3. doi: 10.1016/j.jadohealth.2010.12.008. Epub 2011 May 4.

Is waist circumference a better predictor of insulin resistance than body mass index in U.S. adolescents?

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1
New Hanover Regional Medical Center, Wilmington, North Carolina, USA.

Abstract

PURPOSE:

To determine whether waist circumference (WC) is a better predictor of insulin resistance (IR) than body mass index (BMI) in U.S. adolescents aged 12-18 years.

METHODS:

Using data from the National Health and Nutrition Examination Survey 1999-2002, we evaluated an ethnically diverse sample of 1,571 adolescents with regard to BMI, WC, and fasting glucose and insulin levels. Children were classified as having IR if they had a homeostasis model assessment of insulin resistance (insulin [U/mL] × glucose [mmol/L]/22.5) of greater than 4.39.We created receiver operating characteristic curves predicting IR across various thresholds of WC and BMI, and area under the curve was compared.

RESULTS:

The prevalence rate of IR in the study population was 11.8%. Measures of test performance (sensitivity and specificity) for predicting IR were similar for abnormal BMI and WC thresholds; that is, thresholds of BMI 85th% and WC 75th% and thresholds of BMI 95th% and WC 90th% were quite similar. There were no significant differences in area under the curve for WC versus BMI (.85; 95% CI, .83-.88; p = .84) either for the overall population or for specific racial groups.

CONCLUSIONS:

WC does not seem to provide a distinct advantage over BMI for identifying adolescents with IR.

PMID:
21856529
PMCID:
PMC3188962
DOI:
10.1016/j.jadohealth.2010.12.008
[Indexed for MEDLINE]
Free PMC Article
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