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Figure 2 Risk difference for subsequent revascularization comparing coronary artery bypass graft surgery (CABG) to percutaneous transluminal coronary angioplasty (PTCA) (± stents) for years 1 and 3. The lines represent 95% confidence intervals. For trials with stents, numbers of patients and trials are adjacent to data at one and three years. Year 5 and 8 data were available only for CABG versus PTCA without stent.