Percutaneous coronary intervention (PCI) is widely used in patients with\nchronic total occlusion (CTO), but its benefit in improving long-term outcomes is controversial.\nWe aimed to develop a prediction score for grading â??survival advantageâ? conferred by successful\nresults of CTO-PCI and a scoring system for prediction of the influence of CTO-PCI results on major\nadverse cardiac and cerebrovascular events (MACCEs). Methods: Follow-up data of 2625 patients\nwho underwent CTO-PCI at 65 Japanese centers were analyzed. An integer scoring system was\ndeveloped by including statistical effect modifiers on the association between successful CTO-PCI\nand one-year mortality. Results: Follow-up at 12 months was completed in 2034 patients. During\nfollow-up, 76 deaths (3.7%) occurred. Patients with successful CTO-PCI had a better one-year survival\nthan patients with failed CTO-PCI...........
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