highly significantp < 0.001
In 53 (62.4%) of 85 knees with mild to moderate OA on AP-radiographs (K/L-score ≤ 3), the lateral femorotibial minJSW on the PA-flexed view (2.0 mm, SD 1.1) decreased highly significant ( p < 0.001) compared to the AP view (0.1 mm) and resulted in an increased K/L-score of 4 (Fig. 1 ).