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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: J Adolesc Health. 2011 May 4;49(3):330–333. doi: 10.1016/j.jadohealth.2010.12.008

Table 1. Test Characteristics of Specific BMI and Waist Circumference Thresholds for Predicting Insulin Resistance.

Body Mass Index Waist Circumference
BMI or WC Percentile Threshold Sensitivity
(True Positive Rate)		 Specificity
(True Negative Rate)		 1-Specificity Positive Predictive Value Negative Predictive Value Sensitivity
(True Positive Rate)		 Specificity
(True Negative Rate)		 1-Specificity Positive Predictive Value Negative Predictive Value
≥10th% 1.0 0.06 0.94 0.16 1.0 1.0 0.08 0.92 0.16 0.99
≥25th% 0.99 0.17 0.83 0.18 0.99 0.99 0.18 0.82 0.18 0.99
≥50th% 0.97 0.36 0.64 0.21 0.98 0.95 0.42 0.58 0.23 0.98
≥75th% 0.90 0.61 0.39 0.29 0.97 0.86 0.71 0.29 0.35 0.97
≥85th% 0.83 0.74 0.26 0.36 0.96 - - - - -
≥90th% - - - - - 0.61 0.91 0.09 0.56 0.93
≥95th% 0.68 0.90 0.10 0.55 0.94 - - - - -