Bone & joint research
Accelerometry-based comparison of functional outcomes across total and partial knee and hip arthroplasty : a propensity-matched UK Biobank Study
By Glynou SP, Musbahi O, Sousi S and 1 others.
Abstract
Aims
To evaluate objectively measured physical activity after hip and knee arthroplasty using accelerometry, by comparing bone-preserving procedures with total athorpalsties rthorpalsties and benchmarking both against non-arthritic controls.
Methods
This observational study was conducted within the UK Biobank. Adults aged 40 to 69 years with total knee arthroplasty (TKA), unicompartmental knee arthroplasty (UKA), total hip arthroplasty (THA), or hip resurfacing (HR) were identified through linked hospital records and completed seven-day wrist-worn accelerometry (Axivity AX3). Outcomes included adjusted daily step count (primary), peak cadence, moderate-to-vigorous physical activity (MVPA), and Euclidean Norm Minus One (ENMO). Surgical groups were propensity score-matched to non-arthritic controls on demographics, lifestyle factors, and comorbidities. Direct comparisons between procedure types were examined using both propensity-matched analyses and complementary multivariable regression, and adjusted for demographic and clinical covariates. Subgroup analyses considered < 12 months and ≥12 months post-surgery.
