Incidence and Predictors of 30-Day Hospital Readmission Rate Following Percutaneous Coronary Intervention (from the National Heart, Lung, and Blood Institute Dynamic Registry)

Postdischarge outcomes after percutaneous coronary intervention (PCI) are important measurements of quality of care and complement in-hospital measurements. We sought to assess in-hospital and postdischarge PCI outcomes to (1) better understand the relation between acute and 30-day outcomes, (2) identify predictors of 30-day hospital readmission, and (3) determine the prognostic significance of 30-day hospital readmission. We analyzed in-hospital death and length of stay (LOS) and nonelective cardiac-related rehospitalization after discharge in 10,965 patients after PCI in the Dynamic Registry. From 1999 to 2006 in-hospital death rate and LOS decreased. Thirty-day cardiac readmission rate was 4.6%, with considerable variability over time and among hospitals. Risk of rehospitalization was greater in women and those with congestive heart failure, unstable angina, multiple lesions, and emergency PCI. Conversely, a lower risk of rehospitalization was associated with a larger number of treated lesions. Patients readmitted within 30 days had higher 1-year mortality than those free from hospital readmission. In conclusion, although in-hospital mortality and LOS after PCI have decreased over time, the observed 30-day cardiac readmission rate was highly variable and risk of readmission was more closely associated with underlying patient characteristics than procedural characteristics.