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Table 1 Diagnostic criteria for total subjects

From: Prevalence of diabetes and predictions of its risks using anthropometric measures in southwest rural areas of China

Subjects Test Category Diagnostic criteria Venous plasma glucose (mmol/L)
History of diabetes Steamed bread test Diagnosed diabetes a A positive response to the question, “Has a doctor ever told you that you have diabetes?”  
No history of diabetes OGTT [10] Undiagnosed diabetes Fasting ≥7.0
    2-h ≥11.1
   Isolated IGT Fasting <6.1
    2-h ≥7.8 and <11.1
   Isolated IFG Fasting ≥6.1 and <7.0
    2-h <7.8
   Combined IFG and IGT Fasting ≥6.1 and <7.0
    2-h ≥7.8 and <11.1
   Normal Fasting <6.1
    2-h <7.8
  1. IGT, impaired glucose tolerance.
  2. IFG, impaired fasting glucose.
  3. a The diagnosed diabetes was identified by a positive response to the following question, “Has a doctor ever told you that you have diabetes?” [3].