Review Article

Using Risk Models to Improve Patient Selection for High-Risk Vascular Surgery

Table 2

Multivariate predictors of amputation or graft occlusion 1 year following lower extremity bypass.

VariableHazard ratio95% CI value

Age
<401.40.4–4.70.645
 40–491.9 1.2–3.10.007
50–591.20.8–1.70.424
60–691.20.8–1.70.334
70+10.7–1.50.757
Nonambulatory preoperatively1.6 1–2.50.044
Dialysis1.6 1.1–2.20.008
Diabetes1.6 1.1–2.50.029
Critical limb ischemia1.7 1.3–2.30.0001
Two vein segments2 1.4–2.80.0001
Tarsal target for bypass2.5 1.2–5.30.021
Nursing home residence2.8 1.3–60.011