From: Apolipoprotein E and plasminogen activator inhibitor 1 gene polymorphism in children with chronic renal insufficiency associated with cardiovascular disease
Degree
Findings Group 1 and 2
Group 3
Mild
Fistula failure reported < 2
At anastomotic site
Moderate
Fistula failure reported 2–5
Graft thrombosis
Severe
Fistula failure reported > 5
Extensive