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