Fig. 4.
Association between use of the Anesthesiologist app, a proxy for surgical case volumes, and COVID-19 cases, December 2019–June 2020
App: mobile application; COVID-19: coronavirus disease 2019; PHEIC: public health emergency of international concern, WHO: World Health Organization.
Note: We performed change point detection in time-series data using the cpm package.23 Data points were normalized after calculation of the seven-day moving average by dividing each data point by the maximum data point in the set of values.
