4 List of Figures Figure 1. Map of CARES participants. 11 Figure 2. Age distribution of OHCA events. 20 Figure 3. Etiology of arrest for adults. 21 Figure 4. Etiology of arrest for pediatric patients. 21 Figure 5. Etiology of arrest by age group. 21 Figure 6. Location of arrest. 22 Figure 7. Percentage of events that are bystander witnessed, receive bystander CPR, and survive to hospital discharge by arrest location. 22 Figure 8. Arrest witness status. 23 Figure 9. Presenting arrest rhythm by arrest witness status. 23 Figure 10. Distribution of First Responder and EMS response times (time interval from 911 call to arrival on scene). 25 Figure 11. Survival rate by EMS response time and arrest witness status. 26 Figure 12. Survival rate by EMS response time and arrest witness status, among patients who received bystander CPR. 26 Figure 13. Bystander CPR provision by arrest witness status. 28 Figure 14. Unadjusted survival outcomes after bystander CPR. 28 Figure 15. Unadjusted survival outcomes by who performed first defibrillation in the population with a shockable presenting rhythm. 29 Figure 16. Unadjusted pre-hospital and in-hospital OHCA patient outcomes. 30 Figure 17. Unadjusted survival outcomes by arrest etiology. 31 Figure 18. Unadjusted survival outcomes by presenting arrest rhythm. 31 Figure 19. Unadjusted survival outcomes by arrest witness status. 31 Figure 20. 2018 CARES Non-Traumatic Etiology Utstein Survival Report. 32 Figure 21. 2018 CARES Non-Traumatic Etiology Hospital Survival Report. 35 Figure 22. Variability in overall survival rates, among EMS agencies with ≥150 CARES cases in 2018. 36 Figure 23. Variability in Utstein survival rates, among EMS agencies with ≥150 CARES cases in 2018. 36 Figure 24. Variability in bystander CPR rates, among EMS agencies with ≥150 CARES cases in 2018. 36 List of Tables Table 1. CARES inclusion criteria. 12 Table 2. CARES exclusion criteria. 12 Table 3. Cerebral Performance Category (CPC) scores. 30 Table 4. CARES Healthy People Metrics, 2018. 37