b'42021 CARES Annual Report List of FiguresFigure 1. Map of 2021 CARES participants.12Figure 2. Age distribution of OHCA events.24Figure 3. Etiology of arrest for adults.25Figure 4. Etiology of arrest for pediatric patients.25Figure 5. Etiology of arrest by age group.25Figure 6. Location of arrest.26Figure 7. Percentage of events that are bystander witnessed, receive bystander CPR,and survive to hospital discharge by arrest location.26Figure 8. Arrest witness status.27Figure 9. Presenting arrest rhythm by arrest witness status.27Figure 10. Distribution of First Responder and EMS response times (time interval from 911 call to arrival on scene).29Figure 11. Survival rate by EMS response time and arrest witness status.30Figure 12. Survival rate by EMS response time and arrest witness status, among patientswho received bystander CPR.30Figure 13. Bystander CPR provision by arrest witness status.32Figure 14. Unadjusted survival outcomes after bystander CPR.32Figure 15. Unadjusted survival outcomes by who performed first defibrillation in the populationwith a shockable presenting rhythm.33Figure 16. Unadjusted pre-hospital and in-hospital OHCA patient outcomes.34Figure 17. Unadjusted survival outcomes by arrest etiology.35Figure 18. Unadjusted survival outcomes by presenting arrest rhythm.35Figure 19. Unadjusted survival outcomes by arrest witness status. 35Figure 20. 2021 CARES Non-Traumatic Etiology Utstein Survival Report.36Figure 21. 2021 CARES Non-Traumatic Etiology Hospital Survival Report.39Figure 22. Variability in overall survival rates, among EMS agencies with 200 CARES cases in 2021. 40Figure 23. Variability in Utstein survival rates, among EMS agencies with 200 CARES cases in 2021. 40Figure 24. Variability in bystander CPR rates, among EMS agencies with 200 CARES cases in 2021.40List of TablesTable 1. CARES inclusion criteria. 13 Table 2. CARES exclusion criteria.13 Table 3. Cerebral Performance Category (CPC) scores.34 Table 4. Public Reporting of State Aggregate Metrics, 2021.41'