CARES Annual Report 2018 | 11 The Cardiac Arrest Registry to Enhance Survival (CARES) In 2004, the Centers for Disease Control and Prevention (CDC) established the Cardiac Arrest Registry to Enhance Survival (CARES) in collaboration with the Department of Emergency Medicine at the Emory University School of Medicine. CARES was developed to help communities determine standard outcome measures for out-of- hospital cardiac arrest (OHCA), by linking the three sources of information that define the continuum of emergency cardiac care: 911 dispatch centers, emergency medical services (EMS) providers, and receiving hospitals. Participating EMS systems can compare their performance to de-identified aggregate statistics, allowing for longitudinal benchmarking capability at the local, regional, and national level. CARES began data collection in Atlanta, with nearly 1,500 cases captured in 2006. The program has since expanded to include 23 state-based registries (Alaska, California, Delaware, Florida, Georgia, Hawaii, Illinois, Maine, Maryland, Michigan, Minnesota, Mississippi, Montana, Nebraska, New Hampshire, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Utah, Vermont, and Washington) and the District of Columbia, with more than 70 community sites in 19 additional states. CARES represents a catchment area of almost 130 million people or approximately 40% of the US population. To date, the registry has captured over 425,000 records, with more than 1,700 EMS agencies and over 2,100 hospitals participating nationwide. Figure 1. Map of 2019 CARES participants.