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Body mass index and waist circumference correlate to the same degree with insulin-mediated glucose uptake

Metabolism, ISSN: 0026-0495, Vol: 54, Issue: 10, Page: 1323-1328
2005
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Article Description

To compare the relationship between insulin-mediated glucose uptake (IMGU) and excess adiposity as determined by measurement of either body mass index (BMI) or waist circumference (WC), IMGU was quantified by determining the steady-state plasma glucose (SSPG) concentration with the insulin suppression test and the relationship between the SSPG concentration and BMI or WC evaluated in a study of 208 healthy individuals (128 women/80 men). The results indicated that BMI and WC were correlated ( P <.001) to a similar degree in both men ( r = 0.90) and women ( r = 0.86). Steady-state plasma glucose and both indices of excess adiposity were also significantly correlated ( P <.001) to an essentially identical extent in men ( r values of 0.71 vs 0.70) and women ( r values of 0.54 vs 0.53). When the population was divided into tertiles on the basis of SSPG concentrations, 96% of those in the most insulin-resistant tertile were identified as being overweight/obese by BMI criteria and 84% as abdominally obese by WC criteria. However, a substantial number of those in the most insulin-sensitive tertile also demonstrated excess adiposity as defined by either BMI (45%) or WC (33%). To summarize, (1) BMI and WC correlate closely within an individual and equally well with IMGU, and (2) BMI is as effective as WC in identifying insulin-resistant individuals.

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