The Association of Retinopathy and Plasma Glucose and HbA1c: A Validation of Diabetes Diagnostic Criteria in a Chinese Population

Table 2

Performances of glycemic cutoff points derived from different analytic methods and the WHO criteria in detecting DR.

	Cutoff point	Sensitivity	Specificity
Decile distribution
FPG (mmol/L)	7.03	0.650	0.907
HbA1c (%)	6.4	0.625	0.904
ROC curve analysis
FPG (mmol/L)	6.52	0.750	0.858
HbA1c (%)	5.9	0.775	0.784
WHO criteria
FPG (mmol/L)	7.0	0.650	0.905
2hPG (mmol/L)	11.1	0.353	0.917
HbA1c (%)	6.5	0.625	0.995

Analyzed in 2959 participants after excluding those with known diabetes.
WHO, World Health Organization; DR, diabetic retinopathy; FPG, fasting plasma glucose; HbA1c, glycated hemoglobin A1c; ROC, receiver operating characteristics; 2hPG, 2-hour postload plasma glucose.