Table 1 The Selected MRI cartilage parameters of score and their corresponding coefficients

score0

coefficient of variation of cartilage thickness - medial tibia

0.107674849

The percent of area of subchondral bone denuded of cartilage - anterior medial tibia (%)

0.000946295

The percent of area of subchondral bone denuded of cartilage - central medial femur (%)

0.116403371

minimum cartilage thickness - central medial femur (mm)

-0.045685031

mean cartilage thickness - central medial femur (mm)

-0.033840691

% area of subchondral bone denuded of cartilage -external central medial (%)

0.005973847

scoreΔ12

The change of minimum cartilage thickness -center medial tibia

-0.103293043

The change percent of subchondral bone denuded of cartilage - center medial tibia(%)

0.006184577

The change percent of area of subchondral bone denuded of cartilage - anterior medial tibia (%)

0.051352482

The change percent of area of subchondral bone denuded of cartilage - central medial femur (%)

0.034920672

The chang mean cartilage thickness - central medial femur (mm)

-0.021555888

The change percent of area of subchondral bone denuded of cartilage - central medial femur (%)

0.005259763

scoreΔ24

The change of minimum cartilage thickness of central medial tibia (mm)

-0.062594417

The change of area of cartilage surface of central medial femur(cm^2)

-0.006184622

The change percent of area of subchondral bone denuded of cartilage - central medial femur(%)

0.065893315

The change of mean cartilage thickness of medial tibia-femur compartment (mm)

-0.113420248

The change of mean cartilage thickness of central medial tibia-femur compartment (mm)

-0.220041334