Treatment Outcome / Stents / Multivariate Analysis / Prospective studies / Humans / Female / Male / ROC Curve / PCI / Aged / Middle Aged / Cli / Public health systems and services research / Reproducibility of Results / Pad / Sensitivity and Specificity / PEP / Proportional Hazards Models / Endovascular Procedures / Female / Male / ROC Curve / PCI / Aged / Middle Aged / Cli / Public health systems and services research / Reproducibility of Results / Pad / Sensitivity and Specificity / PEP / Proportional Hazards Models / Endovascular Procedures