Trial design and participants
acute coronary syndrome
SECONDARY, ACUTE CORONARY SYNDROME
We performed a secondary observational analysis of the High-STEACS trial. High-STEACS was a stepped wedge, cluster randomised controlled trial across 10 secondary and tertiary care hospitals in Scotland, UK. Consecutive patients presenting to the emergency department with suspected acute coronary syndrome were screened by the attending clinician using an electronic form for cardiac troponin testing that was embedded within the clinical care pathway. Patients with suspected acute coronary syndrome and with cardiac troponin levels measured using the standard care and trial assays were eligible for inclusion. We excluded those who had already been admitted to hospital during the trial period or who were not resident in Scotland (see supplementary eText 1).