Department of Clinical Epidemiology and Biostatistics;
Mc Master University;
Division of Orthopedics;
Department of Surgery;
Mc Master University;
Department of Orthopaedics;
University of Maryland School of Medicine;
R Adams Cowley Shock Trauma Center;
Proximal; humerus; fracture; Outcomes; Operative; treatment; Non-operative; treatment; Metaanalysis;