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Editor's Choice - Hospital Incidence, Treatment, and In Hospital Mortality Following Open and Endovascular Surgery for Thoraco-abdominal Aortic Aneurysms in Germany from 2005 to 2014: Secondary Data Analysis of the Nationwide German DRG Microdata.
OBJECTIVE: Hospital incidence, treatment modality, and in hospital mortality after surgery are reported for thoraco-abdominal aortic aneurysms (TAAAs) treated by endovascular or open means in Germany from 2005 to 2014.
METHODS: Data were extracted from diagnosis related group statistics from the German Federal Statistical Office. All inpatient cases with a diagnosis of ruptured and non-ruptured TAAA (ICD-10 I71.5 and I71.6) and procedure codes for fenestrated or branched endovascular aortic repair (f/bEVAR 5-38a.7x and 5-38a.8x), open aortic repair (OAR 5-384.4), or hybrid procedure (5-384.b/c, 5-38a.a/b/8/80) were included. To adjust for sex, age, medical risk (Elixhauser comorbidity score), type of procedure, and type of admission, a multilevel multivariable regression model with robust error variance was applied. The primary outcome was in hospital mortality; secondary outcomes were organ complications. The relationship between annual hospital volume and outcome was analysed.
RESULTS: A total of 2607 cases (406 rTAAA, 2201 nrTAAA) were included. f/bEVAR was performed in 856 cases (32.8%), OAR in 1422 cases (54.5%), and hybrid repair in 354 cases (13.6%). Endovascular repair became more frequent over time (6% in 2005 vs. 76% in 2014 for nrTAAA). Hypertension (75.2%), peripheral artery disease (including abdominal aortic aneurysm, 49.5%), other heart diseases (44.6%), coronary heart disease (30.6%), and renal failure (28.7%) were the most frequently coded comorbidities. The number of hospitals treating TAAAs almost tripled within 9 years. The in hospital mortality was 46.1% for rTAAA and 15.9% for nrTAAA. f/bEVAR (RR 0.35, 0.24-0.51) and high hospital volume (p < .001) were significantly associated with decreased in hospital mortality. Aortic rupture, increasing age, and comorbidity were significantly associated with higher mortality (RR 3.17, 2.45-4.09; 1.52, 1.32-1.76, and 1.05, 1.04-1.06).
CONCLUSIONS: Seventy-six percent of all TAAAs were treated endovascularly in 2014 with increasing frequency over a decade. In hospital mortality is lower with endovascular repair and in high volume centres. Aortic rupture, age, and severe comorbidities are associated with worse outcomes.
METHODS: Data were extracted from diagnosis related group statistics from the German Federal Statistical Office. All inpatient cases with a diagnosis of ruptured and non-ruptured TAAA (ICD-10 I71.5 and I71.6) and procedure codes for fenestrated or branched endovascular aortic repair (f/bEVAR 5-38a.7x and 5-38a.8x), open aortic repair (OAR 5-384.4), or hybrid procedure (5-384.b/c, 5-38a.a/b/8/80) were included. To adjust for sex, age, medical risk (Elixhauser comorbidity score), type of procedure, and type of admission, a multilevel multivariable regression model with robust error variance was applied. The primary outcome was in hospital mortality; secondary outcomes were organ complications. The relationship between annual hospital volume and outcome was analysed.
RESULTS: A total of 2607 cases (406 rTAAA, 2201 nrTAAA) were included. f/bEVAR was performed in 856 cases (32.8%), OAR in 1422 cases (54.5%), and hybrid repair in 354 cases (13.6%). Endovascular repair became more frequent over time (6% in 2005 vs. 76% in 2014 for nrTAAA). Hypertension (75.2%), peripheral artery disease (including abdominal aortic aneurysm, 49.5%), other heart diseases (44.6%), coronary heart disease (30.6%), and renal failure (28.7%) were the most frequently coded comorbidities. The number of hospitals treating TAAAs almost tripled within 9 years. The in hospital mortality was 46.1% for rTAAA and 15.9% for nrTAAA. f/bEVAR (RR 0.35, 0.24-0.51) and high hospital volume (p < .001) were significantly associated with decreased in hospital mortality. Aortic rupture, increasing age, and comorbidity were significantly associated with higher mortality (RR 3.17, 2.45-4.09; 1.52, 1.32-1.76, and 1.05, 1.04-1.06).
CONCLUSIONS: Seventy-six percent of all TAAAs were treated endovascularly in 2014 with increasing frequency over a decade. In hospital mortality is lower with endovascular repair and in high volume centres. Aortic rupture, age, and severe comorbidities are associated with worse outcomes.
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