Figure 3. Overall ROC curves of DOISNORE50 from 2018, 2019, and 2020.

ROC curves demonstrate stable predictability across years of preoperative screening regardless of other initiatives that were conducted within the PAC/SNC environment. In a mixed model of sleep questionnaire delivery, by phone or face-to-face contact, and during the COVID-19 pandemic, performance of the questionnaire did not wane. ROC = receiver operating characteristic, SNC/PAC = surgical navigation center and perioperative assessment clinic.