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Uttinger, K.L.* ; Medicke, P.* ; Aldmour, S.* ; Wiegering, A.* ; Steiner, S. ; Schmidt, A.* ; Branzan, D.

Ten year time trends of amputation surgery in peripheral arterial disease in Germany: Before and during the COVID-19 pandemic.

Eur. J. Vasc. Endovasc. Surg. 68, 641-651 (2024)

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OBJECTIVE: Peripheral arterial disease (PAD) has been associated with suboptimal treatment, high mortality, and high amputation rates. It is unclear how the COVID-19 (coronavirus disease 2019) pandemic affected this development in a long term context. METHODS: This was a register based, retrospective, nationwide cohort study including patients hospitalised with PAD as a main or secondary diagnosis and amputation surgery between 2012 - 2021 in Germany. Primary endpoints were population wide major and minor amputation rates, in hospital mortality, and in hospital mortality rates. Secondary endpoints were same admission revascularisations and in hospital mortality in case of complications, i.e., failure to rescue (FTR). Pre-pandemic and pandemic trends, focusing on lockdown periods, were analysed. RESULTS: A total of 365 926 patient records with PAD and amputation surgery were analysed. Median patient age was 75 years and 28.8% were female. Overall population wide amputation and in hospital mortality rates (monthly decrease -0.002/100 000, p < .001, and -0.001/100 000, p < .001, respectively) and in hospital mortality rate (8.0% for 2012 - 2014 vs. 6.5% for 2020 - 2021; p < .001) declined between 2012 and 2020. Concurrently, same admission revascularisations increased (41.0% for 2012 - 2014 vs. 47.0% for 2020 - 2021; p < .001), while FTR decreased in a subset of complications (acute ischaemia, major bleeding, compartment syndrome, and mesenterial ischaemia). In the first pandemic lockdown, there was a temporary trend change to higher major amputations rates (0.02/100 000; p < .001) and higher in hospital mortality rates (+0.007/100 000; p < .001), which changed to a decrease as of the second lockdown (-0.03/100 000, p = .034, and -0.010/100 000, p < .001, respectively) in an interrupted time series analysis. There was no statistically significant change in observed amputation rates during lockdowns, while observed in hospital mortality rates decreased by 12.0% in the first lockdown (0.22/100 000 vs. 0.25/100 000; p = .005) compared with reference periods of the two previous years. CONCLUSION: Between 2012 and 2021, pre-pandemic trends toward decreasing population wide overall amputation rates, fewer major amputations, more amputation related revascularisation procedures, and lower in hospital mortality were maintained despite a temporary trend to increased major amputations and in hospital mortality during the first COVID-19-related lockdown in Germany.

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