Finnvasc score and modified Prevent III score predict long-term outcome after infrainguinal surgical and endovascular revascularization for critical limb ischemia.

ABSTRACT

BACKGROUND: Estimation of the risk of adverse long-term outcome is of paramount importance in the treatment of critical limb ischemia (CLI). METHODS: We evaluated the accuracy of two specific risk score systems, the Finnvasc score and the modified Prevent III (mPIII) score, in 1425 CLI patients who underwent unilateral, infrainguinal surgical (47.6%) or endovascular (52.4%) revascularization. The receiver operating characteristic (ROC) curve analysis was used to estimate the predictive value of these risk scoring methods. RESULTS: The area under the ROC curve of Finnvasc score for prediction of 30-day amputation was 0.609 (95% confidence interval [CI] 0.549-0.677) and of mPIII score 0.533 (95% CI 0.457-0.609). The area under ROC curve of Finnvasc score for prediction of 30-day amputation-free survival was 0.622 (95% CI 0.573-0.671) and of mPIII score 0.588 (95% CI 0.533-0.642). The area under the ROC curve of Finnvasc score for prediction of 1-year amputation-free survival was 0.630 (95% CI 0.597-0.663, P<.0001) and of mPIII score 0.634 (95% CI 0.600-0.667, P<.0001). Finnvasc score predicted leg salvage (relative risk [RR] 1.431, 95% CI 1.319-1.551), survival (RR 1.233, 95% CI 1.116-1.363), and amputation-free survival (RR 1.422, 95% CI 1.319-1.534). mPIII score also predicted leg salvage (RR 1.190, 95% CI 1.108-1.277), survival (RR 1.245, 95% CI 1.193-1.300), and amputation-free survival (RR 1.223, 95% CI 1.176-1.272). CONCLUSIONS: Finnvasc and modified PIII risk scoring methods predict long-term outcome of patients undergoing infrainguinal revascularization for CLI. Finnvasc score seems to perform well also in predicting immediate postoperative outcome.