Improvements in Objectively Measured Activity Behaviors Do Not Correlate With Improvements in Patient-Reported Outcome Measures Following Total Knee Arthroplasty

Frimpong, E.; van der Jagt, D.R.; Mokete, L.; Pietrzak, J.; Kaoje, Y.S.; Smith, Anne; McVeigh, Joanne; Meiring, R.M.

doi:10.1016/j.arth.2019.10.016

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Authors

Frimpong, E.

van der Jagt, D.R.

Mokete, L.

Pietrzak, J.

Kaoje, Y.S.

Smith, Anne

McVeigh, Joanne

Meiring, R.M.

Date

2020

Type

Journal Article

Metadata

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Citation

Frimpong, E. and van der Jagt, D.R. and Mokete, L. and Pietrzak, J. and Kaoje, Y.S. and Smith, A. and McVeigh, J.A. et al. 2020. Improvements in Objectively Measured Activity Behaviors Do Not Correlate With Improvements in Patient-Reported Outcome Measures Following Total Knee Arthroplasty. Journal of Arthroplasty. 35 (3): pp. 712-719.e4.

Source Title

Journal of Arthroplasty

DOI

10.1016/j.arth.2019.10.016

Faculty

Faculty of Health Sciences

School

School of Physiotherapy and Exercise Science

School of Occupational Therapy, Social Work and Speech Pathology

URI

http://hdl.handle.net/20.500.11937/79245

Collection

Curtin Research Publications

Abstract

© 2019 Elsevier Inc. Background: Activity monitors have added a new dimension to our ability to objectively measure physical activity in patients undergoing total knee arthroplasty (TKA). The aim of the study is to assess whether changes in the time spent sitting, standing, and stepping were associated with changes in patient-reported outcome measures (PROMs) before and after TKA. Methods: Valid activPAL data (>3 days) and PROMs were obtained from 49 men and women (mean [SD] age, 62.8 [8.6] years; body mass index, 33.8 [7.1] kg/m2) who underwent primary TKA, before and at 6 weeks or 6 months after surgery. Patient-reported symptoms of pain, stiffness, and knee function were obtained using the Knee injury and Osteoarthritis Outcome Score and Oxford Knee Score questionnaires. Results: Mean (SD) Knee injury and Osteoarthritis Outcome Score (80.1 [16.3] to 41.6 [6.5], P < .001) and Oxford Knee Score (12.0 [9.8] to 17.7 [22.8], P < .001) scores improved 6 months after TKA. Walking time (mean [95% confidence interval]; min/d) increased from before (79 [67-91]) to 6 months after TKA (101 [88-114], P = .006). Standing time (318 [276-360] to 321 [291-352], P = .782) and sitting time (545 [491-599] to 509.0 [459.7-558.3], P = .285) did not change from before to 6 months after TKA. Participants took more steps (2559 [2128-2991] to 3515 [2983-4048] steps/day, P = .001) and accumulated more steps (31 [30-34] to 34 [33-35] steps/min, P < .001) after TKA compared to before. There were no associations between changes in activity behaviors and changes in PROMs (P > .05). Conclusion: Despite improvements in self-reported knee pain and functional ability, these changes do not correlate with improvements in objectively measured light-intensity and sedentary activity behaviors.