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Use of baseline factors to predict complications and reinterventions after endovascular repair of abdominal aortic aneurysm. BJS 2010; 97: 1207-1217.

Published: 19th May 2010

Authors: L. C. Brown, R. M. Greenhalgh, J. T. Powell, S. G. Thompson

Background

It is uncertain which baseline factors are associated with graft‐related complications and reinterventions after endovascular aneurysm repair (EVAR) in patients with a large abdominal aortic aneurysm.

Method

Patients randomized to elective EVAR in EVAR Trial 1 or 2 were followed for serious graft‐related complications (type 2 endoleaks excluded) and reinterventions. Cox regression analysis was used to investigate whether any prespecified baseline factors were associated with time to first serious complication or reintervention.

Results

A total of 756 patients who had elective EVAR were followed for a mean of 3·7 years, by which time there were 179 serious graft complications (rate 6·5 per 100 person years) and 114 reinterventions (rate 3·8 per 100 person years). The highest rate was during the first 6 months, with an apparent increase again after 2 years. Multivariable analysis indicated that graft‐related complications increased significantly with larger initial aneurysm diameter (P < 0·001) and older age (P = 0·040). There was also evidence that patients with larger common iliac diameters experienced higher complication rates (P = 0·011).

Conclusion

Graft‐related complication and reintervention rates were common after EVAR in patients with a large aneurysm. Younger patients and those with aneurysms closer to the 5·5‐cm threshold for intervention experienced lower rates. Copyright © 2010 Crown copyright Published by John Wiley & Sons, Ltd.

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