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01 August 2004

Comparison of simple indices of insulin sensitivity using the euglycemic hyperinsulinemic clamp technique

Marek Strączkowski, Agnieszka Stępień, Irina Kowalska, Ida Kinalska

Med Sci Monit 2004; 10(8): CR480-484 :: ID: 11719

Abstract

Background:The ACE gene insertion/deletion polymorphism has been studied as a risk factor for acute myocardial infarction (AMI) in different populations with conflicting results.Material/Methods: We examined 51 obese subjects, 23 with impaired glucose tolerance (IGT), 28 with normal (obese-NGT), and 37 healthy lean controls. Insulin sensitivity was determined with the euglycemic hyperinsulinemic clamp technique. We estimated indices of insulin sensitivity: fasting plasma insulin (INS), logarithm INS (log [INS]), homeostasis model assessment (HOMA), logarithm HOMA (log [HOMA]) and quantitative insulin sensitivity check index (QUICKI).Results: With clamp technique, we demonstrated a decrease in insulin sensitivity in both obese groups vs controls, and also in IGT compared to NGT subjects. The differences were significant when we used other indices of insulin sensitivity, except those for INS, log [INS] and HOMA between the two obese groups. Indirect indices correlated with insulin sensitivity derived from clamp in the whole population and in the subgroups of control and NGT-obese subjects. In the IGT group, only the correlations with log [INS], log [HOMA] and QUICKI were significant.Conclusions: Simple indices may give valuable information about insulin sensitivity in large studies. Indices based on log-transformed plasma glucose and insulin levels are recommended in subjects with IGT.

Keywords: Obesity - metabolism, Blood Glucose - analysis, Diabetes Mellitus, Type 2 - metabolism, Glucose Clamp Technique - methods, Hyperinsulinism, Insulin Resistance, Obesity - metabolism

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750