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Table 3 Interpretation of ROC curves

From: Use of glucometer and fasting blood glucose as screening tools for diabetes mellitus type 2 and glycated haemoglobin as clinical reference in rural community primary care settings of a middle income country

  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%