b'2021 CARES Annual Report 3 3 ContentsIntroduction5 A Year in Review7 Why CARES Matters: A Story of Survival from OHCA8 Survivors of Cardiac Arrest10 The Cardiac Arrest Registry to Enhance Survival (CARES)12 CARES in Action16 Research Highlights20 2021 Summary Metrics23 Incidence & Demographics24 Chain of Survival29 Survival Outcomes34 Disparities in OHCA Outcomes42 2021 Publications 46 List of Abbreviations & Definitions47 The CARES Group 48'