Statistical analysis plan (SAP): Risk of revision for different types of cup fixation in elderly patients with primary hip osteoarthritis. A study of XXX,XXX primary total hip arthroplasties from the Nordic Arthroplasty Register Association (NARA)

Abstract

Uncemented fixation of THA components are increasingly used. Although cemented femoral component fixation in total hip arthroplasty has shown better results in older patients, less is known about the cup side.