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Amputation rates as a measure of vascular surgical results
M Luther1, M Lepäntalo, A Albäck
1Fourth Department of Surgery, Helsinki University Central Hospital, Finland.
Insights
Reconstructive surgery for critical leg ischaemia (CLI) rose, but amputations decreased in both hospital and population settings over 12 years. Population data offers a less biased view of surgical effectiveness for CLI treatment.
Area of Science:
- Vascular Surgery
- Epidemiology
- Health Services Research
Background:
- Critical leg ischaemia (CLI) management has evolved.
- Reconstructive surgery rates for CLI have changed over time.
- Assessing treatment efficacy requires careful consideration of patient populations.
Purpose of the Study:
- To analyze trends in reconstructive surgery and amputation for CLI.
- To compare amputation rates between referral centers and population samples.
- To evaluate the validity of amputation rates as a measure of reconstructive surgery policy efficacy.
Main Methods:
- Retrospective analysis of patient data over a 12-year period.
- Comparison of outcomes in a referral center versus a population-based sample.
- Examination of patient characteristics and amputation patterns.
Main Results:
- Reconstructive surgery for CLI increased in both settings.
- Amputation numbers remained unchanged in the referral center but decreased by 25% in the population sample.
- Amputations for CLI patients decreased from 58% to 35% in the referral center and 79% to 43% in the population sample.
- Significant differences in patient characteristics and amputation patterns were observed between the two settings.
Conclusions:
- Amputation rates are a potentially biased measure of reconstructive surgery policy efficacy when analyzed solely within referral centers.
- Population-based data provides a more accurate assessment of treatment outcomes for critical leg ischaemia.
- Selection bias in referral centers can skew the interpretation of amputation rates.
Abstract:
Reconstructive surgery for critical leg ischaemia (CLI) increased in both hospital- and population-based patient samples over 12 years. In the referral centre amputation numbers were unchanged over this period, although amputation carried out for patients with CLI decreased from 58 to 35 per cent. In the population sample amputation numbers decreased by 25 per cent and amputations of patients with CLI decreased from 79 to 43 per cent. Patient characteristics and amputation patterns were different in the two settings. Amputation rates as a measure of the efficacy of an arterial reconstruction policy should be used only on a population basis. The analysis is skewed by selection bias in referral centres.