Table 2 Weighted kappa and CI for inter- and intra-reader reliability

Cartilage I

0.59 (0.31;0.87)

0.81 (0.71;0.91)

Cartilage II

0.71 (0.42;1.00)

0.75 (0.62;0.88)

Bone Marrow Lesions

-

-

Size score

0.65 (0.47;0.83)

0.66 (0.56;0.76)

Percentage BML score

0.72 (0.50;0.94)

0.76 (0.64;0.88)

Adjacency score

0.70 (0.48;0.92)

0.78 (0.66;0.90)

Osteophytes

0.71 (0.48;0.94)

0.81 (0.82;0.90)

Effusion

0.51 (0.21;0.81)

0.72 (0.61;0.83)

Synovitis (whole knee)

0.66 (0.42;0.90)

0.70 (0.60;0.80)

Synovitis (subscale)

0.61 (0.27;0.95)

0.58 (0.41;0.75)

Meniscal Extrusion

0.63 (0.38;0.88)

0.67 (0.55;0.79)

Meniscal Signal

0.80 (0.54;1.00)

0.80 (0.67;0.93)

Meniscal Tear

0.70 (0.38;1.00)

0.90 (0.80;1.00)