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Increased hospital costs are associated with low skeletal muscle mass in patients undergoing elective open aortic surgery
Authors:Stephan Koter  Tina U. Cohnert  Korbinian B. Hindermayr  Jörg Lindenmann  Maximilian Brückner  Wolfgang K. Oswald  Georg Werkgartner  Doris Wagner
Affiliation:1. Division of Vascular Surgery, Department of Surgery, Medical University Graz, Graz, Austria;2. Division of Thoracic Surgery, Department of Surgery, Medical University Graz, Graz, Austria;3. Division of General Surgery, Department of Surgery, Medical University Graz, Graz, Austria
Abstract:

Objective

Low psoas muscle area is shown to be an indicator for worse postoperative outcome in patients undergoing vascular surgical. Additionally, it has been associated with longer durations of hospital stay in patients with cancer who undergo surgery and subsequently greater health care costs in Europe and the United States. We sought to evaluate this effect on hospital expenditure for patients undergoing vascular repair in a health care system with universal access.

Methods

Skeletal muscle mass was assessed on preoperative abdominal computed tomography scans of patients undergoing open aortic aneurysm repair in a retrospective fashion. The skeletal muscle index (SMI) was used to define low muscle mass. Health care costs were obtained for all patients and the relationship between a low SMI and higher costs was explored using linear regression and cross-sectional analysis.

Results

We included 156 patients (81.5% male) with a median age of 72 years undergoing elective surgery for infrarenal abdominal aortic aneurysm in this analysis. The median SMI for patients with low skeletal muscle mass was 53.21 cm2/kg and for patients without, 70.07 cm2/kg. Hospital duration of stay was 2 days longer in patients with low skeletal muscle mass as compared with patients with normal (14 days vs 11 days; P = .001), as was duration of intensive care stay (3 days vs 1 day; P = .01). The median overall hospital costs were €10,460 higher for patients with a low SMI as compared with patients with a normal physical constitution (€53,739 [interquartile range, €45,007-€62,471] vs €43,279 [interquartile range, €39,509-€47,049]; P = .001). After confounder adjustment, a low SMI was associated with a 14.68% cost increase in overall hospital costs, for a cost increase of €6521.

Conclusions

Low skeletal muscle mass is independently associated with higher hospital as well as intensive care costs in patients undergoing elective aortic aneurysm repair. Strategies to reduce this risk factor are warranted for these patients.
Keywords:Hospital costs  Health care costs  Skeletal muscle mass  Vascular surgery  Aortic aneurysm  Aortic surgery
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