Comparison of gait, functional activities, and patient-reported outcome measures in patients with knee osteoarthritis and healthy adults using 3D motion analysis and activity monitoring: an exploratory case-control analysis
Received 21 December 2018
Accepted for publication 7 May 2019
Published 20 September 2019 Volume 2019:11 Pages 129—140
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Colin Mak
Peer reviewer comments 2
Editor who approved publication: Professor Clark Hung
Valerie Sparkes,1 Gemma M Whatling,2,3 Paul Biggs,2,3 Nidal Khatib,2,3 Mohammad Al-Amri,1,3 David Williams,2,3 Rebecca Hemming,1,3 Martina Hagen,4 Ishaak Saleem,2,3 Ramesh Swaminathan,2,3 Cathy Holt2,3
1School of Healthcare Sciences, Biomechanics and Bioengineering Research Centre Versus Arthritis, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF24 0AB, UK; 2School of Engineering, College of Physical Sciences and Engineering, Cardiff University, Cardiff CF24 3AA, UK; 3Arthritis Research UK Biomechanics and Bioengineering Centre, Cardiff University, Cardiff CF10 3AT, UK; 4Medical Affairs, Pain Relief Category, GSK Consumer Healthcare S.A., Nyon 1260, Switzerland
Correspondence: Valerie Sparkes Newport Road, Cardiff CF24 0AB UK
Tel +44 29 2068 7560
Objective: To examine functional performance differences using kinematic and kinetic analysis between participants with and without knee osteoarthritis (OA) to determine which outcomes best characterize persons with and without knee OA.
Methods: Participants with unilateral moderate knee OA (Kellgren–Lawrence grades 2 or 3) and controls without knee pain were matched for age, gender, and body mass index. Primary outcomes included temporal parameters, joint rotations and moments, and ground reaction forces assessed via 3D motion capture during walking and ascending/descending stairs. Secondary outcomes included timed functional activities (sit to stand; tying shoelaces), 48 hrs lower limb activity monitoring, and patient-reported outcome measures (Knee Injury and Osteoarthritis Outcome Score, Western Ontario and McMaster Universities Osteoarthritis Index, European Quality of Life–5 Dimensions).
Results: Eight matched pairs were analyzed. Compared with controls, OA participants exhibited significant reductions in peak frontal hip and sagittal knee moments, and decreased peak anterior ground reaction force with the affected limb while walking. Ascending stairs, OA participants had slower speed, fewer strides per minute, longer cycle and stance times, and increased trunk range of motion (ROM) in assessments of both limbs; longer swing time and reduced ankle ROM in the affected limb; and increased knee frontal ROM in the unaffected limb. Descending stairs, OA participants had fewer strides per minute and decreased trunk transverse ROM in assessments of both limbs; increased knee frontal ROM in the affected limb; and longer strides, shorter stance and cycle times, increased trunk sagittal and decreased knee transverse ROMs in the unaffected limbs vs controls. Compared with controls, OA participants had slower walking cadence (120–130 vs 100–110 steps/min, respectively), took significantly longer on timed functional measures, and had significantly worse scores in patient-reported outcomes.
Conclusion: Several objectives and patient-reported measures examined in this study could potentially be considered as outcomes in pharmacologic or physical therapy OA trials.
Keywords: osteoarthritis, knee, 3D motion analysis, biomechanics, kinetics, gait
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