Thirty-day Readmission Rates for Carotid Endarterectomy Versus Carotid Artery Stenting

Because of the emergence of readmission-related Medicare penalties, efforts are being made to identify and reduce patient readmissions. The purpose of this study was to compare rates and risk factors for 30-d readmission and hospital length of stay (LOS) after carotid endarterectomy (CEA) and carotid artery stenting (CAS) among patients treated for carotid artery stenosis in Pennsylvania.

Data were from the Pennsylvania Health Care Cost Containment Council (PHC4). We identified 15,966 patients who underwent CEA (n = 13,557) or CAS (n = 2409) in Pennsylvania between 2011 and 2014. Logistic regression was used to determine risk factors for 30-d readmission, whereas linear regression was used to model factors influencing LOS. Propensity score analysis was used to control for imbalanced covariates between procedures.

Thirty-day readmission rates in Pennsylvania after CEA and CAS for carotid artery stenosis were similar (9.8% and 9.6%, respectively; P = 0.794). Not home discharge destination, Charlson comorbidity index ≥2, and LOS >1 d were all significantly associated with readmission risk. Procedure type (CEA or CAS) did not significantly influence risk. A significant difference in LOS was found between CEA and CAS, but the magnitude of the difference was small (2.38 for CAS versus 2.59 for CEA; P = 0.007). Black race, urgent and emergent cases, and not home discharges significantly increased LOS by notable amounts (1, 1.5, 3.9, and 1.9 d, respectively).

Carotid artery stenosis patients in Pennsylvania undergoing CEA or CAS had similar 30-d readmission rates. Although LOS was significantly different, the magnitude of the difference was not large.