Gait Differs Between Unilateral and Bilateral Knee Osteoarthritis
Archives of Physical Medicine and Rehabilitation,

Creaby MW et al. – The presence of pain unilaterally appears to be associated with asymmetries in knee biomechanics. Contrary to this, bilateral pain is associated with symmetry. This suggests that the symptomatic status of both knees should be considered when contemplating unilateral or bilateral biomechanical interventions for medial knee OA.

Methods
  • The peak knee adduction moment, peak knee flexion moment, knee varus–valgus angle, peak knee flexion angle, toe–out, and trunk lean were computed from 3–dimensional analysis of walking at a self–selected speed.

Results
  • After controlling for walking speed, greater trunk lean toward the more painful knee and reduced flexion in the more painful knee were observed in all OA groups compared with the control group.
  • Between–knee asymmetries indicating greater varus angle and a lower external flexion moment in the painful knee were present in those with unilateral pain and either unilateral or bilateral structural OA.
  • Knee biomechanics were symmetrical in those with bilateral pain and structural OA and in the pain free control group.

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