At 1 year , the composite endpoint of death from any cause , post-PCI myocardial infarction ( MI ) , MI after PCI hospitalization or ischemia-driven target lesion revascularization occurred in 7.9 % of metformin-treated patients and 28.9 % of controls ( hazard ratio 0.25 , 95 % CI 0.10-0 .62 , log rank p = 0.001 ) .