Table 2 Twelve-month joint space narrowing (mean (SD)), in mm, in relation to baseline KLG
Lyon SchussFixed flexion
KLGnJSN, mmp ValueSRMJSN, mmp ValueSRM
0950.02 (0.29)0.510−0.02 (0.32)0.540
140.12 (0.21)0.14*0.31 (0.50)0.31*
2310.11 (0.32)0.060.34−0.06 (0.46)0.470.01
3310.32 (0.49)0.0010.650.05 (0.45)0.550.01

  • JSN, joint space narrowing; KLG, Kellgren and Lawrence grade; SRM, standardised response mean.

  • *Calculation of SRM for a group of only four subjects is not meaningful.