b'Public Reporting of State Aggregate MetricsSurvival after out-of-hospital cardiac arrest varies across regions in the United States. With an increasing number of CARES state participants, there is a unique opportunity to present aggregate metrics by state, allowing for a better understanding of OHCA incidence, survival outcomes, and bystander intervention rates nationwide. Table 4 presents aggregate metrics for state participants with at least 50% population catchment in 2023. A total of 21 states and the District of Columbia voluntarily agreed to participate in reporting these metrics.The included states have a wide range of population catchment (from 610,324 to over 32 million) and incidence rates (from 47.3138.6 per 100,000; a 2.9-fold difference). There is also marked variability in community interventions, with bystander CPR rates ranging from 25.475.2% (a 2.9-fold difference) and public AED use rates ranging from 6.120.5% (a 3.4-fold difference), as well as patient outcomes (overall survival: 7.5-15% (2.0-fold difference); Utstein survival: 13.2-44.3% (3.4-fold difference).CARES sincerely appreciates the willingness of state participants to voluntarily share this valuable information. Reporting of state-level variation in bystander intervention rates and patient outcomes underscores the importance of data collection for OHCA, promotes the sharing of best practices, and facilitates system improvements aimed at saving lives nationwide. \x1f Annual Estimates of the Resident Population: April 1, 2021 to July 1, 2022. Source: U.S. Census Bureau, Population Division.46 47'