Influence of Body Mass Index on Clinical Outcomes in Reverse Total Shoulder Arthroplasty

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The purpose of this study was to compare reverse total shoulder arthroplasty (RTSA) outcomes in normal weight, overweight, and obese patients. A RTSA outcomes registry was reviewed for rotator cuff-deficient patients with a minimum 2-year follow-up. Fractures, rheumatoid arthritis, and revisions were excluded. Based on World Health Organization body mass index (BMI) classification, there were 29 normal weight, 50 overweight, and 51 obese patients. All groups demonstrated significant improvements from preoperative to most recent follow-up in function scores, pain, and forward elevation. Obese and overweight groups had significantly worse preoperative rotation than the normal weight group. Postoperatively, there was no significant difference in absolute values or degree of improvement of rotation between groups. There was no significant difference in the incidence of radiographic or clinical complications between groups. Results of this study suggest that BMI has little influence on outcomes or risk of complication following RTSA. Longer-term studies are needed to determine if these results are maintained. (Journal of Surgical Orthopaedic Advances 26(3):134–142, 2017) Key words: body mass index, cuff tear arthropathy, obesity, retrospective comparative study, reverse total shoulder arthroplasty, rotator cuff deficiency

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J. Michael Wiater, MD; Shannon Carpenter, MD; Denise M. Koueiter, MS; David Marcantonio, MD; and Brett P. Wiater, MD

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