Sensitivity and specificity of different HbA1c cut-off value for diagnosing diabetes and prediabetes
| Status | HbA1c % (mmol/mol) | Sensitivity (%) | Specificity (%) |
| Diabetes | 5.1 (32) | 79.0 | 57.7 |
| 5.2 (33) | 75.4 | 64.8 | |
| 5.3 (34) | 72.3 | 71.3 | |
| 5.4 (36) | 67.7 | 76.1 | |
| 5.5 (37) | 63.8 | 79.9 | |
| 5.6 (38) | 61.0 | 84.1 | |
| 5.7 (39) | 59.5 | 85.9 | |
| 5.8 (40) | 57.1 | 87.7 | |
| 5.9 (41) | 54.2 | 89.1 | |
| 6.0 (42) | 52.8 | 90.1 | |
| 6.1 (43) | 51.0 | 90.7 | |
| 6.2 (44) | 47.6 | 91.6 | |
| 6.3 (45) | 46.7 | 91.9 | |
| 6.4 (46) | 45.0 | 92.3 | |
| 6.5 (47) | 43.4 | 92.6 | |
| Prediabetes | 4.7 (28) | 96.1 | 23.4 |
| 4.8 (29) | 80.3 | 30.6 | |
| 4.9 (30) | 73.9 | 38.7 | |
| 5 (31) | 64.6 | 51.2 | |
| 5.1 (32) | 56.9 | 59.7 | |
| 5.2 (33) | 50.8 | 65.22 | |
| 5.3 (34) | 40.7 | 74.7 | |
| 5.4 (36) | 34.7 | 79.1 | |
| 5.5 (37) | 30.1 | 82.7 | |
| 5.6 (38) | 24.1 | 86.4 | |
| 5.7 (39) | 21.6 | 88.0 |
HbA1c presented % (mmol/mol).
Bold values indicate optimal cut-point chosen by Youden index (J) method.
HbA1c, glycated hemoglobin.