Patient-reported outcome of hip resurfacing arthroplasty and standard total hip replacement after short-term follow-up.

Introduction: The purpose of this study was to investigate patient-reported outcome in terms of satisfaction in two study groups that had undergone hip resurfacing arthro-plasty (HRA) or total hip replacement (THR). The procedure consists of placing a hollow, mushroom-shaped metal cap over the femoral head while a matching metal cup is placed in the acetabulum (pelvis socket).

Material and methods: The two study groups included a total of 84 patients with an average age of 57 years who had idiopathic hip osteoarthritis or secondary arthritis based on mild dysplasia with arthritis. A descriptive cross-sectional design was used. A patient-reported questionnaire was used to evaluate patient outcome three years after hip surgery.

Results: The study showed that both groups (HRA and THR) reported high levels of overall satisfaction, with 97% and 93% being very satisfied or satisfied. Men were more satisfied with their ability to walk longer distances than women (p < 0.05) and the THR group claimed to be treating their artificial hip with more caution than the HRA group (p < 0.05).

Conclusion: The choice of prosthesis (HRA or THR) does not appear to affect the overall satisfaction or patient-perceived functional outcome three years after surgery in patients who on average were 57 years old and who had idiopathic hip osteoarthritis or secondary arthritis based on mild dysplasia.

Funding: A number of the patients included in this study were enrolled in a randomized controlled trial that was financially supported by Protesekompagniet. Furthermore, Centre for Applied Health Services Research and Technology Assessment (CAST) has paid wages in the preparation of the qualitative aspect of the research.

Trial registration: The survey was not registered at Clinical Trials because the starting point for this study was a health technology assessment report based on a randomized controlled trial (RCT). This RCT was registered at Clinical Trials with the identification number NCT01113762. The patient population was partly taken from this RCT and partly from an earlier pilot study conducted at Odense University Hospital. The present study was registered at the Danish Data Protection Agency, registration number 2010-41-5661.