Oral Glucose Tolerance Test (GTT)

Rating Fasting 2 Hour
Normal < 5.5 mmol/L < 7.8 mmol/L
Impaired glucose tolerance < 5.5 mmol/L 7.8 - 11.0 mmol/L
Impaired fasting glycemia 5.5 - 6.9 mmol/L < 7.8 mmol/L
Diabetes mellitus: > 7.0 mmol/L > 11.1 mmol/L

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