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Table 1—

Diagnostic thresholds for diabetes and lesser degrees of impaired glucose regulation

CategoryTest
FPG2-h PG
Normal <100 mg/dl (<5.6 mmol/l) <140 mg/dl (<7.8 mmol/l) 
IFG 100–125 mg/dl (5.6–6.9 mmol/l) — 
IGT — 140–199 mg/dl (7.8–11.0 mmol/l) 
Diabetes* ≥126 mg/dl (≥7.0 mmol/l) ≥200 mg/dl (≥11.1 mmol/l) 
CategoryTest
FPG2-h PG
Normal <100 mg/dl (<5.6 mmol/l) <140 mg/dl (<7.8 mmol/l) 
IFG 100–125 mg/dl (5.6–6.9 mmol/l) — 
IGT — 140–199 mg/dl (7.8–11.0 mmol/l) 
Diabetes* ≥126 mg/dl (≥7.0 mmol/l) ≥200 mg/dl (≥11.1 mmol/l) 

When both tests are performed, IFG or IGT should be diagnosed only if diabetes is not diagnosed by the other test.

*

A diagnosis of diabetes needs to be confirmed on a separate day.

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