Abstract
OBJECTIVEWe examined the predictive value of hyperinsulinemia in the basal state on the 24-year progression from normoglycemia to dysglycemia.RESEARCH DESIGN AND METHODSA sample of 515 normoglycemic men and women were studied again after 24 years for glycemic status.RESULTSHalf of the participants developed dysglycemia: 11.1% progressed to impaired fasting glucose (IFG), 9.9% to impaired glucose tolerance (IGT), 4.5% to both IFG and IGT, and another 24.3% to type 2 diabetes. Elevated levels of overnight fasting (basal) insulin, triglycerides, BMI ≥27 kg/m2, fasting blood glucose, blood pressure, North African or Yemenite background, and male sex each favored conversion to dysglycemia after 24 years. In multiple ordered logistic regression analysis, the most significant predictor of progression to dysglycemia was hyperinsulinemia (upper quintile), after adjusting for BMI, ethnic origin, sex, age, smoking, physical activity, blood pressure, and triglycerides.CONCLUSIONSBasal hyperinsulinemia in normoglycemic adults constitutes an independent risk factor for developing dysglycemia over 24 years.
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