National institute of clinical excellence (NICE) diagnostic criteria

fasting plasma glucose level

5.6 mmol/litre or above

2-hour plasma glucose level

7.8 mmol/litre or above

International Association of Diabetes and Pregnancy Study Groups diagnostic criteria

Fasting plasma glucose level

5.1 mmol/litre or above

1 h plasma glucose

10 mmol/ltre or above

2-h plasma glucose level

8.5 mmol/litre or above