To the Editor: Both the American Diabetes Association (ADA)1 and the World Health Organization (WHO)2 have lowered the fasting plasma glucose (FPG) level for the diagnosis of diabetes from 7.8 mmol/L to 7.0 mmol/L. The Australian Diabetes Society (ADS) has also adopted the lower level.3 However, these organisations differ in the procedure for diagnosis they recommend. The recent article by Hilton and colleagues4 compared these procedures, with particular attention to including an oral glucose tolerance test (OGTT). We, on the other hand, have investigated the impact of lowering the diagnostic FPG level to 7.0 mmol/L.
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