Context
Thirty day readmission rates have become a publicly reported quality performance measure for congestive heart failure (CHF), acute myocardial infarction (AMI), and percutaneous coronary intervention (PCI). However, little is known regarding the factors associated with 30-day readmission after PCI.
Objective
To assess the demographic, clinical, and procedural factors associated with 30-day readmission rates after PCI.
Design, Setting, and Patients
We identified 15,498 PCI hospitalizations (elective or for acute coronary syndromes) from January 1998 through June 2008 at Saint Marys Hospital, Rochester, MN. All were included in this analysis. Multivariable logistic regression models were employed to estimate the adjusted association between demographic, clinical, and procedural variables and 30-day readmission. The association between 30-day readmission and 1-year mortality was estimated using Cox proportional hazards models with readmission as a time dependent covariate and by using landmark analysis.
Main Outcome Measure(s)
All-cause 30-day readmission to any hospital following PCI and 1-year mortality.
Results
Overall, 9.4% of PCIs (n=1,459) were readmitted and 0.68% (n=106) of PCIs resulted in death within 30-days after discharge. After multivariable analysis, female sex, Medicare insurance, less than a high school education, unstable angina, cerebrovascular accident/transient ischemic attack (CVA/TIA), moderate/severe renal disease, chronic obstructive pulmonary disease (COPD), peptic ulcer disease, metastatic cancer, and a length of stay >3 days were associated with an increased risk of 30-day readmission after PCI. Thirty-day readmission after PCI was associated with a higher risk of 1-year mortality (adjusted HR=1.38; 95% CI: 1.08–1.75; p=0.009).
Conclusions
Nearly 1 in 10 patients undergoing PCI were readmitted within 30-days. Thirty-day readmission after PCI was associated with a higher risk of 1-year mortality.