Table A Reproducibility of ordinal variables

    Feature

    kappa

    Narrowing

    0.84

    Acetabular osteophyte

    0.33

    Femoral head osteophyte

    0.84

    Femoral neck osteophyte

    0.61

    Cysts

    0.79

    Sclerosis

    0.53

    Overall qualitative grade

    0.77