Table 2

 Minimum (SD) joint space width (mm) in knees with no definite joint space narrowing in either the medial or lateral tibiofemoral compartment and in the narrowed compartment of knees with medial or lateral osteoarthritis

JSN locationNoneMedialNoneLateral
Compartment JSWMedialMedialLateralLateral
AP, anteroposterior; JSN, joint space narrowing; JSW, joint space width; NS, not significant.
Standing AP radiograph4.33 (1.00), n = 732.40 (1.10), n = 954.99 (1.27), n = 733.36 (1.19), n = 33
Lyon schuss radiograph3.94 (0.88), n = 381.61 (1.2), n = 965.32 (1.16), n = 381.44 (1.30), n = 64
p Value0.045<0.001NS<0.001