Carducci MP, et al. - Via a single surgeon shoulder arthroplasty registry 137 patients who underwent reverse total shoulder arthroplasty (RSA) from 2013 to 2016 with a minimum of 2-year postoperative follow-up were recognized by the experts in order to determine the predictors of unsatisfactory patient outcomes in primary RSA. The majority (75%) of which were arthroscopic, was the only independent factor correlated with both poor progress and outcome before the shoulder surgery. Preoperative opioid use was correlated with poor outcomes only, while the high preoperative American Shoulder and Elbow Surgeons score was related to poor postoperative improvement. Hence, previous ipsilateral shoulder surgery was strongly related to poor clinical improvement and outcome following RSA. Moreover, no other factors correlated with both poor improvement and outcome. Further, given the long-term implications, this correlation was significant to decision making for any shoulder surgery.