Abstract
Objective
To clarify the interactive combinations of various clinical factors associated with
physical activity (PA) at 2 years after total knee arthroplasty (TKA) using classification
and regression tree (CART) analysis.
Design
A retrospective cohort study.
Setting
A single university hospital.
Participants
286 patients who underwent TKA.
Main outcome measures
PA was assessed preoperatively, 3 weeks, and 2 years after TKA. Physical functions,
namely 10m walking test (10MWT), Timed-up and Go test, one-leg standing time, isometric
knee extension and flexion strength, knee joint stability, knee pain, femora-tibial
angle, and the passive knee extension and flexion angle, were measured before surgery
as a baseline and 3 weeks after TKA as acute phase. CART analysis was conducted to
clarify the interactive combinations that accurately predict the PA at 2 years after
TKA.
Results
The results of CART analysis indicated that gait speed (≥ 1.05 m/s) at the acute phase
after TKA was the primal predictor for the postoperative PA at 2 years. The highest
postoperative PA at 2 years was determined by gait speed (≥ 1.05 m/s) and PA (>74.5)
at the acute phase. The PA at baseline and at acute phase, as well as the BMI were
also selected as predictors of postoperative PA at 2 years.
Conclusion
The present study suggested that acquiring gait speed (≥ 1.05 m/s) and PA (>74.5)
in the postoperative acute phase is the predictive of a high PA at 2 years after TKA.
Key words
List of abbreviations:
TKA (Total knee arthroplasty), PA (physical activity), QOL (quality of life), BMI (body mass index), CART (classification and regression tree), 10MWT (10m walking test), TUG (Timed-up and Go test), OLS (one-leg standing), FTA (femora-tibial angle), ANOVA (analysis of variance), R2 (coefficient of determination)To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to Archives of Physical Medicine and RehabilitationAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
Article info
Publication history
Accepted:
December 7,
2022
Received in revised form:
December 1,
2022
Received:
June 29,
2022
Publication stage
In Press Journal Pre-ProofFootnotes
Acknowledgement: None
Identification
Copyright
© 2023 Published by Elsevier Inc. on behalf of the American Congress of Rehabilitation Medicine
