Table 3.

Analysis Plan - List of Covariates

1. Presence of cardiac catheterization lab in the primary destination hospital with the ability to perform 24-7 emergent primary angioplasty;

2. Fully affiliated teaching hospital;

3. Is the ED on Time Consideration (TC) or deferral from ambulances based on workload of acutely ill or injured patients?

4. Is the ED on Consideration (C) or deferral from ambulances based on workload?

5. Weekday;

6. Weekend;

7. Time of day in 8 hour intervals (08:00-16:00, 16:00-24:00, 24:00-08:00);

8. Age (as a continuous variable);

9. Sex;

10. History of MI;

11. History of CABG;

12. History of angioplasty;

13. Location of STEMI (anterior, posterior, inferior);

14. Off load delay (minutes);

15. PCA or PCI or bypass surgery.