Abstract P130: Disparities in Out-of-hospital Cardiac Arrest Rates Among Adults, Aged ≥18 Years Old, With 9-1-1 Emergency Medical Service Activation’s in the United States, 2016

Abstract

Introduction: Out-of-hospital cardiac arrest (OHCA) is a significant public health issue. Hypothesis: This study aims to assess whether patients’ age, sex, race/ethnicity, and urban/non-urban status are associated with the rate of OHCA events among adults who accessed 9-1-1 emergency medical services (EMS) in 2016. Methods: We conducted a cross-sectional analysis using the 2016 National Emergency Medical Services Information System (NEMSIS), a national EMS database. OHCA events among adults aged ≥18 years were extracted by sex, age group, race/ethnicity, urban and non-Urban categories. Those with unknown race/ethnicity (45.8%) or of other race (1.3%) were excluded. Rates of OHCA events were calculated and Chi-square tests were used to assess associations. Results: We identified 205,461 OHCA events with EMS activations among non-Hispanic (NH) whites (68.1%), NH blacks (23.2%), and Hispanics (8.7%) in the 2016 NEMSIS dataset. Of the OHCA events, 59.5% were among males, 81.1% among urban residents, and 15.4% among non-urban residents. The overall OHCA rate was 19.6 per 1,000 EMS activations. OHCA rates per 1,000 EMS activations increased with age for adults until age 74, ranging from 11.2 (18-34 years) to 25.1 (65-74 years), then decreased with age for older adults ≥75 ranging from 22.3 (75-84 years) to 20.8 (≥85 years) ( p <.0001). OHCA rates were higher among males 25.3, Hispanics 20.9, and urban residents 21.7 than females 15.6, other race ethnicities (NH whites 19.8 and NH blacks 18.7), and non-urban residents 17.6 ( p <.0001) respectively. Conlusions: OHCA incidence rates among EMS activations increased with age until age 74. Adult males, Hispanics, and urban patients had statistically significant higher EMS activations for OHCA rates. Findings can be incorporated in community planning for improving EMS services.