What is the Receiver Operator Characteristic (ROC) of the PADDS?
ROC Analysis: The ROC curve is a visual representation of the sensitivity (percentage of true positive that are correctly identified) of a test versus its specificity (percentage of cases without ADHD correctly identified) at each potential cut point for diagnosis. In other words, the ROC provides a comparison of all possible cut-points for diagnostic utility and therefore assists the test developer in selecting and verifying the most appropriate cut point to use to maximize both sensitivity and specificity in determining Positive and Negative Predictive Power (PPP and NPP). From this information, the researcher can then produce likelihood ratios to further improve the diagnostic utility of the test. A diagnostic test for a particular condition should classify patients into two groups: those with the condition and those without. A test is assessed by its ability to diagnose the condition correctly, whether this is positive or negative. The sensitivity of a diagnostic test is the propor
