Table 2.

Agreement between categories of diabetes and prediabetes based on fasting plasma glucose (FPG) and HbA1c criteria*

	FPG
HbA1c:	Not Diabetes	Diabetes	Total
Not diabetes	860	22	882
Diabetes	36	21	57
Total	896	43	939
Kappa (95% CI)	0.39 (0.32, 0.45)
	ADA Categories based on FPG
ADA categories based on HbA1c	Normal	Prediabetes	Diabetes	Total
Normal	342	37	8	387
Prediabetes	374	107	14	495
Diabetes	10	26	21	57
Total	726	170	43	939
Kappa (95% CI)	0.14 (0.10, 0.19)

CI – confidence interval, FPG – fasting plasma glucose, HBA1c – haemoglobin A1c, ADA – American Diabetes Association

*Figures are numbers of study participants, and kappa statistics (95% confidence intervals).