Validating Knee Varus Alignment Measurements Using Markerless Motion Capture

This study aimed to determine the validity of specific knee varus alignment measurement methods. We measured the femorotibial angle (FTA) using radiography and optical motion capture and validated the FTA measurement using markerless motion capture. The subjects included 34 legs of 19 patients with...

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Bibliographic Details
Published in:Geriatrics (Basel) 2023-12, Vol.8 (6), p.109
Main Authors: Todoriki, Kensuke, Kai, Yoshihiro, Mukai, Shogo, Murata, Shin
Format: Article
Language:English
Subjects:
Ankle
Arthritis
Bone surgery
femorotibial angle
Knee
markerless motion capture
Methods
Motion capture
Older people
Osteoarthritis
Radiation
Radiography
Regression analysis
Validity
Variance analysis
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Summary:This study aimed to determine the validity of specific knee varus alignment measurement methods. We measured the femorotibial angle (FTA) using radiography and optical motion capture and validated the FTA measurement using markerless motion capture. The subjects included 34 legs of 19 patients with knee osteoarthritis (OA). One-way analysis of variance and multiple comparison tests were used to compare the FTA values between the Kellgren–Lawrence classification (KL) and Pearson’s correlation coefficient for validity. The analysis showed that the FTA measured by markerless motion capture had a significant correlation to the FTA measured by radiography (r = 0.869, p < 0.01) and significantly increased with increasing KL (p < 0.05). These results indicate that markerless motion capture is a valid outcome measure for varus alignment in patients with knee OA.
ISSN:2308-3417
2308-3417
DOI:10.3390/geriatrics8060109