Document Detail

Long-term outcomes and resource utilization of endovascular versus open repair of abdominal aortic aneurysms in Ontario.
MedLine Citation:
PMID:  20045624     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Two large randomized trials showed that elective endovascular aneurysm repair (EVAR) had similar all-cause long-term mortality rates but increased costs compared with open repair for nonruptured abdominal aortic aneurysms (AAAs). Despite these data, the use of EVAR continues to increase in North America. Currently, there are very limited adjusted population-based data examining long-term outcomes and resource utilization.
METHODS: All patients who underwent elective AAA repair between April 2002 and March 2007 in Ontario were identified using data from hospital discharge abstracts. Patients were identified with a validated algorithm. A propensity score analysis was used to adjust for treatment allocation. Clinical outcomes included time to all-cause death and discharge to a nursing home or long-term care facility. Resource utilization outcomes included imaging utilization, hospital utilization, and reintervention rates.
RESULTS: Overall, 6461 patients underwent treatment of nonruptured AAAs, comprising 888 EVARs and 5573 open repairs. EVAR patients were older and had more comorbidities. The adjusted mortality was significantly lower in the EVAR group at 30 days (adjusted odds ratio [adj-OR], 0.34; 95% confidence interval [95% CI], 0.20-0.59), but long-term mortality was similar (adj-OR, 0.95; 95% CI, 0.81-1.05). EVAR patients were significantly less likely to be discharged to a nursing home or other chronic care facility (adj-OR, 0.55; 95% CI, 0.41-0.74). Imaging utilization as well as urgent and vascular readmissions were significantly higher in the EVAR group. However, the EVAR group had a significantly shorter length of stay and less intensive care unit use for the index hospitalization and decreased hospital length of stay during follow-up. There was a trend toward a slightly increased risk of reintervention with EVAR (adj-OR, 1.3; 95% CI, 0.98-1.75).
CONCLUSION: Compared with open repair, EVAR significantly reduced short-term but not long-term mortality. The EVAR patients spent less time in health institutions, including long-term care facilities, but underwent more imaging studies. Future improvements in EVAR could result in further decreases in reinterventions and subsequent radiologic monitoring.
Prasad Jetty; Paul Hebert; Carl van Walraven
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2010-01-04
Journal Detail:
Title:  Journal of vascular surgery     Volume:  51     ISSN:  1097-6809     ISO Abbreviation:  J. Vasc. Surg.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-08     Completed Date:  2010-04-13     Revised Date:  2012-10-03    
Medline Journal Info:
Nlm Unique ID:  8407742     Medline TA:  J Vasc Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  577-83, 583.e1-3     Citation Subset:  IM    
Division of Vascular Surgery, The Ottawa Hospital, University of Ottawa, Ontario, Canada.
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MeSH Terms
Aged, 80 and over
Aortic Aneurysm, Abdominal / diagnosis,  mortality,  surgery*
Aortography / utilization
Blood Vessel Prosthesis Implantation / adverse effects,  mortality,  utilization*
Health Resources / utilization*
Hospital Mortality
Kaplan-Meier Estimate
Length of Stay
Long-Term Care / utilization
Nursing Homes / utilization
Odds Ratio
Patient Discharge
Patient Readmission
Propensity Score
Proportional Hazards Models
Retrospective Studies
Risk Assessment
Surgical Procedures, Elective
Time Factors
Treatment Outcome
Comment In:
J Vasc Surg. 2010 Sep;52(3):818-9   [PMID:  20816324 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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