TABLE 2.

Prevalence (95% confidence interval) of prediabetes by definition

	Prevalence (95%CI)
Visit 2 (1990–92)
ADA fasting glucose, 5.6–6.9 mmol/L	37.9 (37.0, 38.8)
WHO fasting glucose, 6.1–6.9 mmol/L	11.2 (10.6, 11.8)
ADA HbA1c, 39–46 mmol/mol	18.7 (18.0, 19.4)
IEC HbA1c, 42–46 mmol/mol	8.95 (8.42, 9.50)
Visit 4 (1996–98)
ADA fasting glucose, 5.6–6.9 mmol/L	29.8 (28.7, 30.8)
WHO fasting glucose, 6.1–6.9 mmol/L	8.63 (8.00, 9.30)
ADA/WHO 2-hour glucose, 7.8–11.0 mmol/L	27.9 (26.9, 29.0)

Abbreviations: ADA, American Diabetes Association; CI, confidence interval; IEC, International Expert Committee; WHO, World Health Organization