Table 3.

Clinical use of the scoring system^a

Variable	Points	Score	Variable Definitions
Age ≥65 yr	+2		Age at time of fistula creation
PVD	+3		Documented lower extremity revascularization, digit or extremity amputation, history of claudication and ischemic extremity changes or gangrene
CAD	+2.5		Documented coronary stenosis by angiography or history of myocardial infarction or previous coronary revascularization by angioplasty, stenting, or bypass surgery
White	−3		Not of black, Asian, aboriginal, or other non-European descent
Baseline score		+3	All patients are given baseline score of 3
Total			Sum of scores