Table 1. Our inclusion and exclusion criteria as applied independently by three of the authors during the initial title/abstract review.

VAS: visual analog scale, ASES: American Shoulder and Elbow Surgeons, WOOS: Western Ontario Osteoarthritis of the Shoulder, SST: Simple Shoulder Test, SANE: Single Assessment Numeric Evaluation, DASH: Disabilities of the Arm, Shoulder, and Hand Questionnaire, SF-12 PCS: 12-item Short Form Health Survey Physical Composite Scale

Inclusion criteria	Exclusion criteria
Level III evidence or higher	Systematic reviews, review papers, case reports, case series, and other level IV/level V studies
Ages 18-90	Absence of preoperative and postoperative data
Diagnosis of primary glenohumeral osteoarthritis	Hemiarthroplasty, head replacement surgeries/stemless implants, recessed glenoid components
Follow-up of ≥2 years	Prior existing rotator cuff disease
Presence of any of the following outcome measures: VAS scores, satisfaction scores, ASES scores, WOOS scores, SST scores, constant-total scores, SANE scores, Quick DASH scores, SF-12 PCS scores, revision rate, complication rate, or postoperative range of motion	Prior shoulder arthroplasty