Background Females, as compared to males have more risk factors and comorbidities, whose severity increases with age.While it has remained undefined because of conflicting Result in previous studies whether female gender is a risk factor for worse outcomes after percutaneous coronary intervention (PCI), the combination of being elderly (i.e., ＞ 75 years old) and female may be a risk factor.There are thus far no solid data in tiis area.