Table 3.
Interpretation of ROC curves
| VPG (Ref.) vs CBG | HbA1c (Ref.) vs. CBG | HbA1c (Ref.) vs. VPG | |
|---|---|---|---|
|
Positive state for ROC curve |
7.0 mmol/L |
7% |
7% |
|
No. positive |
4 |
7 |
7 |
|
No. negative |
665 |
634 |
634 |
|
Area under curve |
0.898 |
0.754 |
0.733 |
|
Std.Err. |
0.036 |
0.068 |
0.104 |
|
Asympt. Sig. |
0.006 |
0.021 |
0.033 |
|
95% CI Lower bound Upper bound |
0.827 0.970 |
0.620 0.888 |
0.529 0.938 |
|
Optimal test result for |
5.6 |
5.03 |
4.6 |
|
Sensitivity |
75.0% |
85.7% |
85.7% |
| Specificity | 100 – 21.2% | 100 – 50.0% | 100 – 73.8% |