Variation in Survival After Out-of-Hospital Cardiac Arrest Between Emergency Medical Services Agencies

Emergency medical services (EMS) deliver essential initial care for patients with out-of-hospital cardiac arrest (OHCA), but the extent to which patient outcomes vary between different EMS agencies is not fully understood.To quantify variation in patient outcomes after OHCA across EMS agencies.This observational cohort study was conducted in the Resuscitation Outcomes Consortium (ROC) Epistry, a prospective multicenter OHCA registry at 10 sites...