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To investigate two year association of varus knee thrust perceived during walking with odds of worsening WOMAC knee pain in elderly with or at risk of OA.
This
study elucidates a longitudinal relationship between varus knee thrust noticed
during walking and knee pain. The use of biomechanical interventions to mitigate
thrust in the prevention of new and worsening of pain can be justified by using
the longitudinal relationship between knee thrust and WOMAC pain.
To
investigate two year association of varus knee thrust perceived during walking
with odds of worsening WOMAC knee pain in elderly with or at risk of OA.
The
researchers assessed the video recordings of self-paced walking trials of MOST
(Multicenter Osteoarthritis Study) participants for the presence of varus
thrust at the baseline. WOMAC questionnaire was used to record Knee pain at
baseline and two years. Estimation of the odds of worsening defined as either
an increase in WOMAC score or clinically-significant worsening knee pain,
adjusting for age, sex, race, BMI, clinic site, gait speed, and static knee
alignment was carried out through logistic regression. Arranged by baseline
radiographic OA status and among the subset of knees without baseline WOMAC
pain the analyses were repeated.
3204
knees of 1623 participants were used to calculate results. Varus thrust was
observed in 31.5% knees. The knees with varus thrust at 95% CI: 1.19, 1.73 had
1.44 times the odds of any and at 95% CI: 1.11, 1.69 had 1.37 times the odds of
clinically-significant worsening WOMAC pain compared to knees without thrust.
Knees with thrust without baseline WOMAC pain portrayed 2.01 (95% CI: 1.47,
2.74) times the odds of incident total pain.
Results
showed that varus thrust is a risk factor for worsening and incident of knee
pain. In older adults, targeting varus thrust through non-invasive therapies
could prevent worsening or development of knee pain or in those at risk for
knee OA.
Arthritis Care & Research
Association of Varus Knee Thrust during Walking with Worsening WOMAC Knee Pain: The Multicenter Osteoarthritis Study.
Alexandra E. Wink et al.
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