Effect of Alignment of the Medial Tibial Plateau and X-ray Beam on Apparent Progression of Knee Osteoarthritis in the Standing Anteroposterior Radiograph
نویسندگان
چکیده
Introduction: Previous studies of the radiographic progression of knee osteoarthritis (OA) have yielded highly inconsistent estimates of the overall rate and variability of joint space narrowing (JSN)—a surrogate for loss of articular cartilage. Published estimates of the annual rate of JSN in these studies, all of which relied on the conventional standing anteroposterior (AP) radiograph, have varied ten-fold, from 0.06–0.60 mm/yr, with coefficients of variation (CV) of JSN ranging from 200–400% [1].
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