title: Outcomes of carotid stenting compared with endarterectomy are equivalent in asymptomatic patients and inferior in symptomatic patients.
abstract: BACKGROUND
  Despite the current Centers for Medicare and Medicaid Services coverage criteria for carotid artery stenting (CAS), consensus regarding its appropriateness in patients with carotid artery stenosis has not been reached. This is one of the first population-based studies to use a dedicated administrative convention for the endovascular procedure to address whether there is a cohort of patients in whom CAS is more beneficial than carotid endarterectomy (CEA).
  
  
  METHODS
  We analyzed in-hospital mortality, postoperative stroke, and combined postoperative stoke/mortality in 47,752 CAS or CEA hospitalizations, matched by propensity score, in discharge data sets obtained from the states of New York and California for the years 2005 to 2007. Other outcomes included postoperative complications, length of stay, and volume-outcome relationships.
  
  
  RESULTS
  For symptomatic patients undergoing CAS, rates were significantly higher for in-hospital mortality (3.7% vs 1.3%) and combined stroke/mortality (8.3% vs 4.6%) compared with CEA. For asymptomatic patients, there was no statistical difference between mortality (0.6% vs 0.4%), stroke (2.0% vs 1.8%), or combined stroke/mortality (2.4% vs 1.9%) across the endovascular and open procedures, respectively. Postoperative respiratory and urinary complications as well as cranial neuropathy were more common after CEA, whereas postoperative complications, including device malfunction and hypotension, were more frequent after CAS. We did not find a volume-outcome relationship for CEA, but one did exist for CAS.
  
  
  CONCLUSIONS
  In symptomatic patients with carotid artery stenosis, the most appropriate procedure appears to be CEA, whereas CAS appears to be a suitable minimally invasive approach for asymptomatic patients. On the basis of these results and data from recent multicenter randomized trials, the use of CAS in symptomatic patients should be approached with caution.
authors.affiliation: Department of Evidence and Health Policy Mount Sinai School of Medicine, New York, NY, USA.
authors.forename: Jeannine K
authors.initials: JK
authors.lastname: Giacovelli
authors.forename: Natalia
authors.initials: N
authors.lastname: Egorova
authors.forename: Rajeev
authors.initials: R
authors.lastname: Dayal
authors.forename: Annetine
authors.initials: A
authors.lastname: Gelijns
authors.forename: James
authors.initials: J
authors.lastname: McKinsey
authors.forename: K Craig
authors.initials: KC
authors.lastname: Kent
mesh_terms: D000368:Aged; D017130:Angioplasty / Q000009:adverse effects / Q000295:instrumentation*; D002140:California; D016893:Carotid Stenosis / Q000150:complications / Q000401:mortality / Q000601:surgery / Q000628:therapy*; D016894:Endarterectomy, Carotid / Q000009:adverse effects / Q000401:mortality; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D007902:Length of Stay; D016015:Logistic Models; D008297:Male; D009518:New York; D018579:Patient Selection; D057216:Propensity Score; D018570:Risk Assessment; D012307:Risk Factors; D015607:Stents; D020521:Stroke / Q000209:etiology; D013997:Time Factors; D016896:Treatment Outcome