Aibinder W, Schoch B, Parsons M, et al. - This study was undertaken to investigate patient-specific, implant-specific, and technique-specific risk factors for intraoperative complications, postoperative complications, and the occurrence of revisions after anatomic (aTSA) and reverse (rTSA) total shoulder arthroplasty. Researchers recruited a total of 2,964 aTSA and 5,616 rTSA patients in an international database of primary shoulder arthroplasty. The risk factors associated with complications and revisions were assessed by performing multivariate analyses. The data indicate that analyzing the effect of numerous patient-specific and implant-specific risk factors and ascertaining their impact on complications and revision shoulder arthroplasty can help assist surgeons in counseling patients and guiding patient expectations following aTSA or rTSA. In patients with a history of previous shoulder surgery who are at elevated risk of both intraoperative and postoperative complications, care should be taken.