Study Population
MAY
All patients 18 years or older who underwent surgery in 1 of 48 designated ORs were enrolled. During our institutional transition to the Epic electronic health record (EHR) from May 21 to September 10, 2018, data were excluded due to data quality and technical issues. Patients were excluded if greater than 50% of their case duration (anesthesia start to anesthesia stop time) occurred outside of the ACT staffed hours, which were typically from 