b'Regional Variation in OHCA OutcomesThe marked regional variation in OHCA patient outcomes and bystander intervention rates among CARES communities allows for comparisons of system performance and outcome metrics. The figures below compare overall survival rates (Figure 22), Utstein survival rates (Figure 23), and bystander CPR rates (Figure 24) among the 173 EMS agencies with 200 CARES cases in 2023. These figures highlight substantial variability among participating agencies, with ranges as follows: overall survival 3.424.2% (more than 7-fold difference); Utstein survival 0.060.9% (60-fold difference); bystander CPR 13.778.8% (more than 5-fold difference). The bars in each figure represent communities with populations ranging from 100,000 to over 3 million. The red dotted line denotes the national average for benchmarking purposes (overall survival: 10.2%; Utstein survival: 32.8%; bystander CPR: 41.2%), while the grey vertical lines indicate quartile cut points.Figure 22. Variability in overall survival rates, among EMS agencies with 200 CARES cases in 2023.Figure 23. Variability in Utstein survival rates, among EMS agencies with 200 CARES cases in 2023.Figure 24. Variability in bystander CPR rates, among EMS agencies with 200 CARES cases in 2023.44 45'