Fig. 2

Case volume differences and distribution across patient groups. Note. Case volume differences between the two observation periods (03/2019–02/2020 vs. 03/2020–02/2021) stratified by primary/secondary patients (direct admission to surgical department and transferred from other departments, respectively) and admission type. Black dot and whiskers indicate overall case volume change and 95% confidence intervals. Stacked bar charts show the relative case volume change for the different patient groups. Bars right to the black line indicate an increased case volume. N_{Period 1} = 95,826. N_{Period 2} = 80,957