Comparison of the [13C]Glucose Breath Test to the Hyperinsulinemic-Euglycemic Clamp When Determining Insulin Resistance

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Abstract

OBJECTIVE - With increasing emphasis on the recognition of the metabolic syndrome and early type 2 diabetes, a clinically useful measure of insulin resistance is desirable. The purpose of this study was to evaluate whether an index of glucose metabolism, as measured by 13CO2 generation from ingested [13C]glucose, would correlate with indexes from the hyperinsulinemic-euglycemic clamp. RESEARCH DESIGN AND METHODS - A total of 26 subjects with varying degrees of insulin sensitivity underwent both the [13C] glucose breath test and the hyperinsulinemic-euglycemic clamp. Results from the [13C]glucose breath test were compared with measures of insulin sensitivity from the glucose clamp as well as with other commonly used indexes of insulin sensitivity. RESULTS - There was a strong correlation between the [13C]glucose breath test result and the glucose disposal rate (r = 0.69, P < 0.0001) and insulin sensitivity index (r = 0.69, P < 0.0001) from the insulin clamp. The magnitude of these correlations compared favorably with QUICKI and were superior to the homeostasis model assessment. CONCLUSIONS - The [13C]glucose breath test may provide a useful noninvasive assessment of insulin sensitivity.

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Lewanczuk, R. Z., Paty, B. W., & Toth, E. L. (2004). Comparison of the [13C]Glucose Breath Test to the Hyperinsulinemic-Euglycemic Clamp When Determining Insulin Resistance. Diabetes Care, 27(2), 441–447. https://doi.org/10.2337/diacare.27.2.441

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