Background. The impact of the surgeon and surgical center characteristics on choice of autogenous arteriovenous (AV) fistula versus artificial AV graft as permanent vascular access for hemodialysis has not been studied. Methods. We used national data from the Department of Veterans Affairs Veterans Health Administration to measure the association of surgeon and surgical center characteristics with choice of initial permanent vascular access among patients undergoing their first vascular access placement procedure between October 1, 2000 and September 30, 2001 (fiscal year 2001). Data were analyzed using a hierarchical logistic regression model clustered for surgical center and surgeon. Results. The study population included 1114 patients, 74 Veterans Administration Medical Centers, and 182 surgeons. Seventy-two percent of patients received an AV fistula as their initial form of permanent vascular access. After adjusting for differences in patient, center, and surgeon characteristics, odds of AV fistula placement at high volume centers (<30 procedures per year) were more than three times greater than at low volume centers [odds ratio (OR) 3.26, 95% confidence interval (95% CI) 1.37 to 7.75, P = 0.008]. In addition, a strong clustering effect was present at the level of the surgeon (OR 1.55, 95% CI 1.19 to 2.03, P = 0.001) but not at the level of the surgical center, indicating an association with surgeon practice pattern. Conclusion. Barriers to AV fistula placement can exist at the levels of the surgeon and surgical center, respectively. Future strategies to improve AV fistula placement rates should target surgeons and surgical centers in addition to patients, nephrologists, and primary care providers.
Bibliographical noteFunding Information:
The authors would like to thank Ellen Zufall for sharing her extensive knowledge of Department of Veterans Affairs data with us, and both Ellen Zufall and Danila Manapsal for conducting preliminary Austin database searches during grant preparation. This project was funded by the Agency for Healthcare Research and Quality (AHRQ R03 HS11471). Dr. Hynes and Dr. Stroupe and Mr. Colin are supported by VIREC VA HSR&D Service grant SDR-98-004 and VA HSR&D grant ECI-20-016. Dr. O'Hare is supported by a fellowship training grant by the National Kidney Foundation with matching support from the National Kidney Foundation of Northern California.
- AV fistula
- AV graft
- Vascular access