Table 2. Selected threshold values of glycosylated hemoglobin and associated data.

Variable	Value
Threshold percentage, %	5.05	5.15	5.25	5.35	5.45	5.55	5.65	5.75	5.85
No. of patients ≥threshold (TP+FP)	304	268	234	163	116	78	56	40	28
% of patients ≥threshold	88.6	78.1	68.2	47.5	33.8	22.7	16.3	11.7	8.2
Sensitivity, %	98.2	95.4	93.6	87.2	73.4	50.5	42.2	31.2	23.9
Specificity, %	15.8	29.9	43.6	70.9	84.6	90.2	95.7	97.4	99.1
Positive predictive value, %	35.2	38.8	43.6	58.3	69.0	70.5	82.1	85.0	92.9
Negative predictive value, %	94.9	93.3	93.6	92.2	87.2	79.6	78.0	75.2	73.7
False positive rate, %	84.2	70.1	56.4	29.1	15.4	9.8	4.3	2.6	0.9
False negative rate, %	1.8	4.6	6.4	12.8	26.6	49.5	57.8	68.8	76.1
Positive likelihood ratio	1.17	1.36	1.66	3.00	4.77	5.15	9.81	12.00	26.56
Negative likelihood ratio	0.11	0.15	0.15	0.18	0.31	0.55	0.60	0.71	0.77
TN+FN	39	75	109	180	227	265	287	303	315
Youden index	0.140	0.253	0.372	0.581	0.580	0.407	0.379	0.286	0.230

TP, true positive; FP, false positive; TN, true negative; FN, false negative.