[Epidemiology from the Trans Atlantic Inter-Society Consensus Group Guidelines II]

Area of Science:

• Vascular Surgery
• Epidemiology
• Cardiovascular Disease

Context:

• Critical limb ischemia (CLI) presents a significant health challenge with limited direct incidence data.
• Prevalence estimates suggest higher rates in Western countries (500-1,000/million/year) compared to Japan (100-200/million/year).
• Key risk factors include diabetes, advanced age, smoking, lipid disorders, and low ankle-brachial index.

Purpose:

• To summarize the epidemiology and clinical outcomes of critical limb ischemia.
• To highlight the major risk factors associated with CLI development.
• To emphasize the importance of timely interventions for limb salvage and patient survival.

Summary:

• CLI incidence is estimated between 500-1,000 per million annually in Western countries.
• Diabetes is the primary risk factor, alongside age, smoking, lipid abnormalities, and low ankle-brachial pressure index.
• Without intervention, 40% of CLI patients face limb loss within 6 months, and up to 20% may die; 1-year mortality reaches 20% due to comorbidities.

Impact:

• CLI management requires urgent revascularization strategies to prevent major amputations.
• Below-knee amputation is preferred to preserve mobility and enhance long-term survival.
• Optimal revascularization significantly improves life expectancy and functional outcomes for CLI patients.