Abstract:Objective To investigate whether there exists difference in in-hospital outcomes between male and female elderly patients with coronary artery diseases after percutaneous coronary intervention (PCI). Methods In a single center, a total of 502 consecutive patients (aged ≥75 years, 36.5% women and 63.5% men) who underwent PCI from January 2005 to December 2010 were recruited in this cohort study. Clinical features and in-hospital outcomes were compared between males and females. Results The age of the 502 patients was (78.5±3.2) years. The in-hospital length was (23.2±6.5)d. The male patients presented higher prevalence of ST elevation myocardial infarction but lower incidence of heart failure than the female ones. There was no significant difference in the successful rate of in-hospital procedures (94.3% vs 94.5%, P=1.000) and in mortality (1.3% vs 3.3%, P=0.093) between the male and female patients. Conclusion For the patients over 75 years old with coronary artery diseases, PCI is a good choice with higher successful rate and acceptable mortality. Although males have worse baseline conditions, there is no difference in in-hospital outcome between males and females after PCI.