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Table 2 Differences between the CREST and the Guidant Corporation/FDA analysis

From: Organizing the Carotid Revascularization Endarterectomy versus Stenting Trial (CREST): National Institutes of Health, Health Care Financing Administration, and industry funding

Aspect of the trial Superiority (CREST) Equivalence (Guidant Corporation/FDA analysis)
Hypothesis format Traditional Equivalency
Primary events Stroke, myocardial infarction, or death in 30 days; Stroke, myocardial infarction, or death in 30 days;
  ipsilateral stroke thereafter ipsilateral stroke thereafter
Follow-up Variable follow up (1-4 years) 1-year follow up
Statistical comparison Differences in hazard of event Event rate at 1 year