b'22Incidence & Demographics2020 Dataset and Incidence of OHCA Events This report describes CARES data from the most recent calendar year, January 1 to December 31, 2020. CARES requires that an EMS Agency enter at least one complete calendar year of data and meet a patient lost to follow-up threshold of less than 1% to be included in the Annual National Report. The CARES 2020 National Reports can be viewed at: https://mycares.net/sitepages/reports2020.jsp. Descriptive statistics in this report are presented as frequencies or proportions for categorical variables, and median and interquartile ranges for continuous variables. Comparison of proportions were conducted using the chi-square test. The 2020 dataset includes 1,741 EMS Agencies and 1,962 Hospitals, and represents a population of 143.5 million, approximately 44% of the U.S. population. In 2020, 127,376 OHCA events were reported to CARES. The crude incidence of non-traumatic, worked arrests was 88.8 per 100,000, significantly greater than the incidence rates observed for the three preceding years (range: 74.3-76.5 per 100,000). Using 2020 census data to extrapolate to the U.S. population9, CARES estimates that there were approximately 291,500 EMS-treated, non-traumatic OHCAs in the United States last year.Demographics In 2020, CARES patients were predominately male (62.1%). Of the reported OHCA events, 97.6% (n=124,262) were adults and 2.4% (n=3,073) were children, 18 years and younger. The median age of OHCA patients was 65.0 years (mean: 62.3; SD: 19.0). The age distribution varied significantly across the sexes (Figure 2), with females having a higher median age of arrest (66.0 vs 64.0 years, p.0001).Figure 2. Age distribution of OHCA events.9Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2019 Source: U.S. Census Bureau, Population Division.'