Table 1.

Summary of WHO diagnostic criteria (1999) for diabetes and intermediate hyperglycaemia.

Classifications	Venous plasma glucose levels
Normal	Fasting 2-h glucose	<6.1 mmol/l Not specified but <7.8 mmol/l implied
Diabetes	Fasting glucose 2-h glucose	≥7.0 mmol/l or ≥11.1 mmol/l
IGT	Fasting glucose <8.0 mmol/l 2-h glucose	<7.0 mmol/l and ≥7.8 and <11.1 mmol/l
IFG	Fasting glucose 2-h glucose	≥6.1 and <7.0 mmol/l and <7.8 mmol/l (if measured)

Foot notes: IGT = Impaired Glucose Tolerance; IFT = Impaired Fasting Glycaemia; 2-h = 2 h after ingestion 75 gm glucose solution.