# Sensitivity/Specificity compared to Area Under Curve as measure of Screen Accuracy

In relation to the disorder I'm studying Screen A is reported as having a sensitivity of 90% and a specificity of 89%. Screen B is reported as having a AUC of .79 with no other data provided. Could someone please explain the relative difference between these screens? I assume screen A is more useful but but by how much?

• What Frank Harrell says is a valid criticism if you have the probability scores. I get the feeling that you're getting something like a physician's diagnosis of sick/healthy, so just the discrete outcome, not a probability. Is this correct?
– Dave
Nov 4 '20 at 19:24

• Sens and spec require the use of arbitrary cutpoints an are usually discouraged. AUROC can be thought of as the $c$-index (concordance probability) and requires no cutoffs. But also consider proper probability accuracy scores such as Brier. Sep 2 '17 at 13:01