Comparing two or more ROC curves

Plot multiple receiver-operator characteristics (ROC) curves to make comparisons between them.

1. Select a cell in the dataset.
2. On the Analyse-it ribbon tab, in the Statistical Analyses group, click Diagnostic, and then under the Accuracy heading, click:

   Option	Description
   Compare ROC Curves	Compare 2 or more independent ROC curves.
   Compare Correlated ROC Curves	Compare 2 or more paired/correlated ROC curves.

   The analysis task pane opens.
3. In the True state drop-down list, select the true condition variable.
4. In the Positive event drop-down list, select the state that indicates the presence of the condition/event of interest.
5. If comparing 2 or more independent ROC curves, in the Y drop-down list, select the diagnostic test variable, and then in the Factor drop-down list, select the grouping variable.
6. If comparing 2 or more paired/correlated ROC curves, in the Y list, select the diagnostic test variables.
7. Click Calculate.