Absence of an acute insulin response predicts onset of type 2 diabetes in a Caucasian population with impaired glucose tolerance

J Clin Endocrinol Metab. 2008 Jul;93(7):2633-8. doi: 10.1210/jc.2007-2837. Epub 2008 May 6.

Abstract

Context: In persons with impaired glucose tolerance (IGT), both impaired insulin secretion and insulin resistance contribute to the conversion to type 2 diabetes mellitus (T2DM). However, few studies have used criterion standard measures to asses the predictive value of impaired insulin secretion and insulin resistance for the conversion to T2DM in a Caucasian IGT population.

Objectives: The objective of the study was to determine the predictive value of measures of insulin secretion and insulin resistance derived from a hyperglycemic clamp, including the disposition index, for the development of T2DM in a Caucasian IGT population.

Design, setting, and participants: The population-based Hoorn IGT study consisted of 101 Dutch IGT subjects (aged < 75 yr), with mean 2-h plasma glucose values, of two separate oral glucose tolerance tests, between 8.6 and 11.1 mmol/liter. A hyperglycemic clamp at baseline was performed to assess first-phase and second-phase insulin secretion and insulin sensitivity. During follow-up, conversion to T2DM was assessed by means of 6-monthly fasting glucose levels and yearly oral glucose tolerance tests.

Results: The cumulative incidence of T2DM was 34.7%. Hazard ratio for T2DM development adjusted for age, sex, and body mass index was 5.74 [95% confidence interval (CI) 2.60-12.67] for absence of first insulin peak, 1.58 (95% CI 0.60-4.17) for lowest vs. highest tertile of insulin sensitivity, and 1.78 (95% CI 0.65-4.88) for lowest vs. highest tertile of the disposition index.

Conclusions: In these Caucasian persons with IGT, the absence of the first insulin peak was the strongest predictor of T2DM.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Blood Glucose / analysis*
  • Diabetes Mellitus, Type 2 / epidemiology
  • Diabetes Mellitus, Type 2 / etiology*
  • European Continental Ancestry Group
  • Female
  • Glucose Intolerance / blood
  • Glucose Intolerance / complications*
  • Glucose Tolerance Test
  • Humans
  • Incidence
  • Insulin / blood*
  • Male
  • Middle Aged
  • Proportional Hazards Models

Substances

  • Blood Glucose
  • Insulin