Ethnic Disparities of Arrival Following ST Elevation Myocardial Infarction in South Israel

Background: Early activation of the emergency medical service (EMS) is crucial for the care of patients with STEMI. Methods: A retrospective cohort study of patients hospitalized with STEMI was conducted. Two groups of patients were compared: Bedouins and Jews. The primary outcome was one-year mortality. The secondary endpoints were 30-day mortality, mode of transportation and door-to-balloon time. Results: There were 445 Bedouin patients (BPs) and 1103 Jewish patients (JPs). BPs with STEMI were significantly younger than JPs, had more diabetes and higher rates of smoking. More JPs arrived at the hospital by ambulance compared to BPs (56.9% vs. 31.9%, p < 0.001). Direct transportation to the catheterization laboratory was observed in 51.9% of JPs and in 43.6% of BsP, p = 0.003. Door-to-balloon time was longer in BPs compared to JPs (median 65 min vs. 62 min, p = 0.044). There were no differences in one-year, 30-day and in-hospital mortality between the two groups. After adjustment by propensity score analysis for JPs vs. BPs, there was a protective factor for one-year mortality (hazard ratio (HR), 0.68; 95% CI 0.48-0.97), p = 0.034. Thirty-day and one-year mortality in the subgroup of BPs that arrived at the hospital from the outpatient clinic was higher compared to JPs (7.1% vs. 4.4%, p = 0.004 and 10.4% vs. 5.6%, p < 0.001, relatively) Conclusions: Underuse of EMS by BPs with STEMI compared to JPs resulted in a delay in direct transportation to the catheterization laboratory, longer door-to-balloon time and a higher 30-day and one-year mortality in the subgroup of BPs who arrived at the hospital after visiting an outpatient clinic.