Comparison of Transradial Versus Transfemoral Percutaneous Coronary Intervention in Routine Practice

In any observational study, there is always the possibility that unmeasured confounders bias the intended comparison regardless of the statistical approach used, including the use of advanced multivariable modeling or propensity score methods. In method 2, we performed 1:1 matching of transradial and transfemoral PCI patients based on propensity score accounting for 19 demographic, clinical, and procedural covariates including anticoagulation strategy.