The primary analysis was performed on an intention to treat basis for all patients with
confirmed STEMI following emergent coronary angiogram. Analysis of all randomized patients
was also performed to examine differences in baseline characteristics (Supplemental Table 4).
Analysis of primary endpoint and all cardiac biomarker analyses was performed by an independent
statistician, blinded to treatment allocation. We assessed whether the distribution of the main
clinical variables was similar between groups, taking into account whether they later fulfilled
eligibility criteria (Supplemental Table 5). To examine possible bias due to exclusion after
randomization of patients with an alternative diagnosis to STEMI, and possible effect of the
intervention on the diagnosis itself, we compared baseline and procedural characteristics, and
secondary endpoints available in patients included in the analysis versus those who were excluded