Background. Reverse total shoulder arthroplasty (RSA) is a standard treatment for proximal humeral fractures (PHF) and its sequelae. In this study we analyzed the clinical outcomes of primary vs. secondary RSA for displaced PHF in elderly patients. Methods. We retrospectively reviewed 68 cases of primary or secondary RSA for displaced PHF. For 51 patients (28 primary RSA, 23 secondary RSA), a minimum 12month follow-up with clinical and radiological assessment was available. Clinical assessment comprised joint active range of motion, DASH, Constant-Murley Score (CMS), Subjective Shoulder Value, and Visual Analog Scale for pain. Outcomes and complications of patients