PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT

DeVito P, Damodar D, Berglund D, et al. PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT. Orthop Procs. 2020;102-B(SUPP_1):74-74. doi:10.1302/1358-992X.2020.1.074

DeVito, P., et al. “PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT.” Orthopaedic Proceedings, vol. 102-B, no. SUPP_1, 2020, pp. 74-74., https://doi.org/10.1302/1358-992X.2020.1.074

DeVito, P., Damodar, D., Berglund, D., Vakharia, R., Moeller, E., Giveans, M., Horn, B., Malarkey, A., & Levy, J. (2020). PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT. Orthopaedic Proceedings, 102-B(SUPP_1), 74-74. https://doi.org/10.1302/1358-992X.2020.1.074

DeVito, P., Damodar, D., Berglund, D., Vakharia, R., Moeller, E., Giveans, M. et al. (2020) “PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT.” Orthopaedic Proceedings, 102-B(SUPP_1), pp. 74-74. Available at: https://doi.org/10.1302/1358-992X.2020.1.074

DeVito, P., D. Damodar, D. Berglund, R. Vakharia, E.A. Moeller, M.R. Giveans, B. Horn, A. Malarkey, and J. Levy. “PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT.” Orthopaedic Proceedings 102-B, no. SUPP_1 (2020): 74-74. https://doi.org/10.1302/1358-992X.2020.1.074

DeVito P, Damodar D, Berglund D, Vakharia R, Moeller E, Giveans M, et al. PREDICTING OUTSTANDING RESULTS AFTER REVERSE SHOULDER ARTHROPLASTY USING PERCENTAGE OF MAXIMAL OUTCOME IMPROVEMENT. Orthop Procs. 2020 Feb 1;102-B(SUPP_1):74-74. https://doi.org/10.1302/1358-992X.2020.1.074

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Abstract

Background

The purpose of this study was to determine if thresholds regarding the percentage of maximal improvement in the Simple Shoulder Test (SST) and American Shoulder and Elbow Surgery (ASES) score exist that predict “excellent” patient satisfaction (PS) following reverse total shoulder arthroplasty (RSA).

Methods

Patients undergoing RSA using a single implant system were evaluated pre-operatively and at a minimum 2-year follow-up. Receiver-operating-characteristic (ROC) curve analysis determined thresholds to predict “excellent” PS by evaluating the percentage of maximal improvement for SST and ASES. Pre-operative factors were analyzed as independent predictors for achieving SST and ASES thresholds.

Results

198 (SST) and 196 (ASES) patients met inclusion criteria. For SST and ASES, ROC analysis identified 61.3% (p<.001) and 68.2% (p<.001) maximal improvement as the threshold for maximal predictability of “excellent” satisfaction respectively. Significant positive correlation between the percentage of maximum score achieved and “excellent” PS for both groups were found (r=.440, p<.001 for SST score; r=0.417, p<.001 for ASES score). Surgery on the dominant hand, greater baseline VAS Pain, and cuff arthropathy were independent predictors for achieving the SST and ASES threshold.

Conclusion

Achievement of 61.3% of maximal SST score improvement and 68.3% of maximal ASES score improvement represent thresholds for the achievement of “excellent” satisfaction following RSA. Independent predictors of achieving these thresholds were dominant sided surgery and higher baseline pain VAS scores for SST, and rotator cuff arthropathy for ASES.

Keywords

Percentage of maximal improvement; Predictors; American Shoulder and Elbow Surgery Score; Simply Shoulder Test; Reverse shoulder Arthroplasty; Satisfaction.