Abstract
The influence of diagnosis on outcomes after reverse shoulder arthroplasty (RSA) is not completely understood. The purpose of this study was to compare clinical outcomes of different pathologies. A total of 699 RSAs were performed for the following diagnoses: (1) rotator cuff tear arthropathy (RCA), (2) massive cuff tear (MCT) with osteoarthritis (OA), (3) MCT without OA, (4) OA, (5) acute proximal humeral fracture, (6) malunion, (7) nonunion, and (8) inflammatory arthropathy. All patients had minimum 2-year clinical follow-up (mean, 47 months; range, 24-155 months). Range of motion, Simple Shoulder Test scores, American Shoulder and Elbow Surgeonsscores, visual analog scale scores for function, and health-related quality-of-life measures were obtained preoperatively and postoperatively. The RCA, MCT-with-OA, MCT-without-OA, and OA groups all exhibited significant improvements in all outcome scores and in all planes of motion from preoperatively until a minimum of 2 years postoperatively. The malunion, nonunion, and inflammatory arthropathy groups showed improvements in American Shoulder and Elbow Surgeons scores, Simple Shoulder Test scores, forward flexion, and abduction. The average changes for all other outcomes and planes of motions were also positive but did not reach statistical significance. After adjustment for age and compared with RCA, female patients with malunion had significantly poorer forward flexion (P < .05), those with OA had significantly better abduction (P < .05), and those with fractures had significantly worse patient satisfaction (P < .05). Among male patients, those with MCTs without OA had significantly worse satisfaction (P < .05). RSA reliably provides improvement regardless of preoperative diagnosis. Although subtle differences exist between male and female patients, improvements in clinical outcome scores were apparent after RSA.
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