Fig. 4

Differences in sagittal, coronal and axial angles of the knee between supine and standing. An asterisk (*) indicates a significant difference (p<0.05), a double asterisk (**) indicates a significant difference (p<0.01). a Flexion angle by K-K grade. b Varus angle by K-L grade. c Tibial internal rotation angle by K-L grade. The change in the flexion angle differed significantly between K–L grades 1 and 4 (p < 0.05). Changes in the adduction angle differed significantly between K–L grades 1 and 4 and between grades 2 and 4 (p < 0.01). Changes in the internal rotation angle differed significantly between K–L grades 1 and 2, between grades 1 and 3, and between grades 1 and 4 (p <0.01)