Influential factors for readmission after percutaneous coronary intervention

Background Short-term hospital readmissions after percutaneous coronary intervention （PCI） account for higher medical costs and poor prognosis of patients with coronary artery disease （CAD）. However, patients at high risk for readmission are not yet identified. Methods A total of 1416 patients successfully treated with PCI were included. Data of age, sex, presentation type of CAD, cardiac function, coexistent diseases, con- trast dose, numbers of lesions and stents implanted, procedure complication, out-of-hospital medication were collected. Cox regression model was employed to analyze the multiple factors influencing readmission. Results 75.8% of all readmissions were due to CAD and the average readmission time was 422 days. Univariate analysis and multivariate Cox regression model eventually showed that patients with any procedure complica- tions and/or more lesions in number were at higher risk for readmission while older age, smoke, urgent PCI and more stents implanted prevented them from readmitting. Conclusion The major cause of readmission af- ter PCI is still CAD itself. During the index hospitalization of PCI, patients with multi-vessel disease need careful treatment and procedure complications should be prevented in order to extend the interval of readmis-sion.