Optimal Hemoglobin A1c Levels for Screening of Diabetes and Prediabetes in the Japanese Population

Table 4

Sensitivity, specificity, positive and negative predictive values, positive and negative likelihood ratios, and accuracy for detecting prediabetes defined by OGTT.

HbA1c (%)	Sensitivity (%)	Specificity (%)	Youden index	Positive predictive value (%)	Negative predictive value (%)	Positive likelihood ratio	Negative likelihood ratio	Accuracy
≧5.3	92.0	25.4	0.17	44.1	83.3	1.2	0.3	51.4
≧5.4	91.4	26.0	0.17	44.2	82.6	1.2	0.3	51.6
≧5.5	85.5	40.7	0.26	47.9	81.3	1.4	0.4	58.1
≧5.6	71.1	56.5	0.28	51.1	75.3	1.6	0.5	62.2
≧5.7	60.6	72.1	0.33	58.1	74.0	2.2	0.5	67.6
≧5.8	49.0	83.2	0.32	65.1	71.8	2.9	0.6	69.8
≧5.9	34.9	89.8	0.25	68.6	68.3	3.4	0.7	68.4
≧6.0	22.5	94.1	0.17	71.1	65.5	3.8	0.8	66.2
≧6.1	13.5	98.0	0.12	81.0	63.9	6.6	0.9	65.0
≧6.2	8.4	99.2	0.08	87.5	62.8	10.9	0.9	63.8