Table 2: Statistical analysis of KOOS and WOMAC scores comparing values at baseline and 12 months. Values listed are the change in scores over a 12-month period

KOOS and WOMAC scores: baseline to 12-month comparison.
MeanQ1MedianQ3Signed rank value

WOMAC pain−5.295−7.29−6.25−4.685<0.0001
WOMAC stiffness−2.95−4.17−3.645−2.085<0.0001
WOMAC physical function−19.2−31.775−20.84−11.46<0.0001
KOOS symptoms11.6641216<0.0001
KOOS pain19.447.77518.8928.33<0.0001
KOOS daily living17.367.6514.1226.62<0.0001
KOOS sports22.4382032<0.0001
KOOS quality of life18.51017.527.5<0.0001

Q1: 1st quartile, Q3: 3rd quartile. For all categories . Values listed above are measured as differences in WOMAC/KOOS scores subtracted from baseline.