Does physical activity affect risk of revision of total hip arthroplasty? A matched pairs study

Abstract

Purpose: The purpose of this study was to investigate differences in level of physical activity between patients who underwent revision after surgery with total hip arthroplasty and those who did not. Secondary purposes were to study if level of physical activity, frequency of physical activity, body mass index, sex or age could predict the risk of revision an to find out if patients were sufficiently active.

Methods: The patients who had surgery with total hip arthroplasty at any time and required a revision were identified (n = 27) and matched with controls. The primary outcome measure was the University of California Los Angeles activity scale. Secondary outcome measures were risk prediction including body mass index, age, year between total hip arthroplasty and revision, frequency of physical activity, and level of physical activity.

Results and conclusions: There were no statistical significant differences for University of California Los Angeles activity scale score between samples (p = .914). 44% Of the participants in the revision group and 33% in the control group were insufficiently active. Level or frequency of physical activity did not increase the risk of revision (OR 0.96 and 0.46), nor did body mass index, age or sex (OR 1.00, 0.98 and 1.00).

Keywords:

• Total hip arthroplasty
• risk factor
• revision
• physical activity
• body mass index

Acknowledgements

We would like to thank the Orthopaedic Clinic at the hospital of Blekinge and Blekinge Centre of Competence who supported this research project.

Disclosure statement

The authors report no declaration of interest. The authors declare that they have no competing interests.

Ethics, consent and permissions

This study was carried out in accordance with the Declaration of Helsinki. Participation in the study was voluntary and participants were informed of their right to end their participation at any time. Completed and returned questionnaire counted as patients giving informed consent.

Identification of participants by name, social security number or otherwise will not be possible. Approval by the Regional Ethical Review Board in Lund was obtained (Dnr 2014/255).