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Articles by T. Aizawa
Total Records ( 2 ) for T. Aizawa
  M. Takayama , K. Yamauchi and T. Aizawa
  Not available
  R. Oka , T. Aizawa , K. Yagi , K. Hayashi , M. Kawashiri and M. Yamagishi


To investigate whether the elevation of liver enzymes is associated with the progression from normal to impaired glucose tolerance.


A historical cohort study was conducted in 594 male workers at public schools, who had normal glucose tolerance at baseline. The progression to impaired glucose tolerance and impaired fasting glycaemia during a mean follow-up of 3.1 years was measured using an oral glucose tolerance test.


Overall, 141 (23.7%) subjects developed impaired glucose tolerance and 68 (11.4%) subjects developed impaired fasting glycaemia, 23 of whom had combined impaired fasting glycaemia/impaired glucose tolerance. The incidence of impaired glucose tolerance increased significantly with increasing quartiles of serum aspartate aminotransferase, alanine aminotransferase and γ-glutamyltransferase (P for trend <0.01). In Cox proportional hazards regression analysis, after adjusting for comprehensive risk factors, including plasma glucose levels, BMI and homeostatic model assessment of insulin resistance, the risk of progression to impaired glucose tolerance was significantly higher in the highest quartile of alanine aminotransferase than in the lowest quartile (hazard ratio 2.5; 95% CI 1.1-5.7). A significant association between alanine aminotransferase and the progression to impaired glucose tolerance was found after further adjustments for other liver enzymes or after the sample was limited to those with BMI < 25.0 kg/m2 or with fasting plasma glucose < 5.5 mmol/l.


A higher level of alanine aminotransferase was independently associated with progression from normal to impaired glucose tolerance in Japanese men. The elevation of alanine aminotransferase may be a change that occurs early in the evolution of diabetes.

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