Survival after below-knee amputation in diabetes has not improved

Design

National population study, mortality-linked Hospital Episode Statistics, Kaplan-Meier and Cox models

Population

25,176 people with diabetes undergoing 28,232 below-knee amputations in England

Primary outcome

All-cause mortality after below-knee amputation

Effect

Mortality 23.5% at 1 year, 60.0% at 5 years, 82.3% at 10 years; no improvement since 2012

An England population study tracked 25,176 people with diabetes through 28,232 below-knee amputations, linking the procedures to mortality records over 25 years.

All-cause mortality was 23.5% at one year, 60.0% at five years and 82.3% at ten, with no improvement since 2012. A contralateral amputation reached 6.43% by five years. Older age, greater comorbidity and female sex marked the highest-risk patients. These are counselling numbers: a major amputation signals advanced systemic disease, and most of the later deaths are cardiovascular rather than surgical.

The practice change is upstream. The stark survival should sharpen foot-risk stratification, prompt earlier vascular and multidisciplinary referral for the threatened limb, and drive aggressive cardiovascular risk management once an amputation has happened, because the contralateral limb and the heart are the next events. It also reframes what the operation means for patients and families.

• One-year mortality after below-knee amputation was 23.5%, rising to 82.3% at ten years.
• Survival has not improved since 2012 despite modern care.
• A second, contralateral amputation occurred in 6.43% by five years.
• Treat an amputation as a marker of advanced systemic disease; most later deaths are cardiovascular.
• Intensify cardiovascular risk management and protect the remaining limb after any major amputation.

Why it matters

It shows the operation is a sentinel event for systemic disease, not an endpoint in itself.

Don't overread it

This is observational and describes who dies, not why a given patient will; it cannot attribute the deaths to the amputation itself.

The statistics, in plain English

These are absolute survival rates from a Kaplan-Meier analysis, not a treatment comparison; the hazard ratios (such as older age HR 1.62) rank risk within the amputation group rather than against people without an amputation.

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