Why the study?
To evaluate which trunk-worn IMU movement quality parameters distinguish gait in hip or knee osteoarthritis vs controls, their sensitivity to gait changes after TKA, and correlation with patient-reported outcomes.
Does total knee arthroplasty improve movement quality parameters measured by a single trunk-worn IMU in patients with knee osteoarthritis compared to baseline and asymptomatic controls?
Population
20 people with hip OA, 18 with knee OA, and 20 asymptomatic controls
Comparison
Hip OA vs knee OA vs controls, and pre- vs post-TKA timepoints
Design
Prospective cohort study
Follow-up
12 months
Key result
Patients with hip or knee osteoarthritis demonstrated significantly more asymmetrical gait patterns compared to asymptomatic controls (mean difference in vertical step regularity 0.13, p<0.001 for hip OA).
Authors
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Objective IMU gait measures detect asymmetry in hip/knee osteoarthritis; hypothesis-generating for tracking arthroplasty response but should not yet change practice.
Cohort (n=58)
Yes
Does total knee arthroplasty improve movement quality parameters measured by a single trunk-worn IMU in patients with knee osteoarthritis compared to baseline and asymptomatic controls?
Mean Difference: 0.13
Absolute Event Rate: 0.64% vs 0.78%
p-value: p=<0.001
A single lower back IMU can objectively characterize gait movement quality before and after total joint arthroplasty, and these biomechanical improvements correlate with patient-reported outcomes.
Emmerzaal et al. (2021) conducted a cohort in Hip or knee osteoarthritis (n=58). Osteoarthritis and Total Knee Arthroplasty vs. Asymptomatic controls was evaluated on Step regularity in the vertical (VT) direction (MD 0.13, p=<0.001). Patients with hip or knee osteoarthritis demonstrated significantly more asymmetrical gait patterns compared to asymptomatic controls (mean difference in vertical step regularity 0.13, p<0.001 for hip OA).