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Diabetes mellitus is the major risk factor for African Americans who undergo peripheral bypass graft operation

T E Brothers1, J G Robison, B M Elliott

  • 1Department of Surgery, Section of Vascular Surgery, Medical University of South Carolina, USA.

Journal of Vascular Surgery
|February 10, 1999
PubMed

Insights

Diabetes mellitus significantly increases the risk of lower extremity bypass graft surgery, particularly for African American women. This highlights diabetes as a critical factor in vascular health disparities.

Area of Science:

  • Vascular Surgery
  • Public Health
  • Epidemiology

Background:

  • African Americans, especially women, face higher risks of lower extremity ischemia requiring infrainguinal bypass grafts.
  • The disproportionately higher prevalence of diabetes mellitus in this demographic necessitates investigating its role compared to other risk factors.

Purpose of the Study:

  • To compare the contribution of diabetes mellitus with other risk factors (smoking, hypertension) for infrainguinal bypass graft operations.
  • To analyze the impact of diabetes on the need for bypass graft surgery and subsequent limb salvage rates in different ethnic and gender groups.

Main Methods:

  • Retrospective case-control study involving 764 patients undergoing infrainguinal revascularization.
  • Comparison with the 1995 statewide Behavior Risk Factor Surveillance System database.
  • Analysis of risk factors including diabetes mellitus, smoking, and hypertension.

Main Results:

  • Diabetes mellitus showed a significantly higher odds ratio (OR) for bypass graft surgery across all groups, especially in African American women (OR, 24.9).
  • Diabetes was a stronger predictor (OR, 15.7) than smoking (OR, 4.5) or hypertension (OR, 4.6).
  • African American patients had worse limb salvage rates at 3 years (64%) compared to other groups (75%), despite similar graft patency.

Conclusions:

  • Diabetes mellitus is the primary risk factor driving the need for bypass graft operations, particularly in African American women.
  • Higher diabetes prevalence may explain increased tissue necrosis and distal bypass grafting needs in this population.
  • Diabetes contributes to reduced long-term limb salvage observed in African American women undergoing these procedures.
Abstract

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