Risk-standardized survival rates for out-of-hospital cardiac arrest were 1.9% lower at emergency medical service (EMS) agencies working in Black and Hispanic catchment areas than in white catchment areas in this study including 764 EMS agencies. This difference was not explained by EMS response times, rates of EMS termination of resuscitation, or first responder rates of initiating cardiopulmonary resuscitation or applying an automated external defibrillator. These findings suggest there is a need for further assessment of these discrepancies.
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