Development and Validation of a Tool for Assessing Glucose Impairment in Adolescents
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Development and Validation of a Tool for Assessing Glucose Impairment in Adolescents

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    Childhood obesity is associated with an increased risk for type 2 diabetes. Early identification of adolescents at risk for impaired fasting blood glucose may lead to earlier and more comprehensive evaluation and intervention. Because widespread blood glucose testing of adolescents is not recommended, community-based tools are needed to identify those who could benefit from further testing. One such tool, developed for adults, was the Tool for Assessing Glucose ImpairmenT (TAG-IT). Our objective was to validate whether a similar tool could be useful for community-based screening of glucose impairment risk among adolescents.


    Our study sample consisted of 3,050 adolescents aged 12 to18 years who had participated in the 1999-2008 National Health and Nutrition Examination Survey (NHANES). Half of participants were female and 40% were nonwhite. NHANES measured fasting blood glucose and height, weight, and resting heart rate. We used Pearson correlations and regression analysis to determine key variables for predicting glucose impairment. From these measurements, we created a composite TAG-IT score for adolescents called TAG-IT-A. We then applied the TAG-IT-A model to 1988-1994 NHANES data, using linear regression analysis and receiver operating characteristic analysis to determine how well the TAG-IT-A score predicted a fasting blood glucose at or above 100 mg/dL.


    We determined that age, sex, body mass index, and resting heart rate were predictors of impaired fasting blood glucose and that TAG-IT-A was a better predictor of impaired fasting blood glucose than body mass index alone (area under the curve, 0.61, P < .001 vs 0.55, P = .10, respectively). A TAG-IT-A score of 3 or higher correctly identified 50% of adolescents with impaired fasting blood glucose, while a score of 5 or higher correctly identified 76% .


    The TAG-IT-A score is a simple screening tool that clinicians and public health professionals could use to easily identify adolescents who may have impaired fasting blood glucose and need a more comprehensive evaluation.

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