The present study investigated the static sagittal alignment of patients suffering from knee osteoarthritis (KOA) to explore compensatory mechanisms in this population, and to determine if the sagittal alignment was associated with secondary lower back pain (LBP).
Patients who met the following criteria were recruited for the study: diagnosis of primary KOA, ambulatory without assistance, normal muscle strength in the lower extremity, and no leg-length discrepancy.
Posterior-anterior and lateral digital radiographs of the spine, pelvis and proximal femur were taken using a standard protocol with the subject standing upright.
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