Table 4 A priori hypotheses of the expected correlations and realized correlations between the KOOS subscales and the subscales of the WOMAC, SF-36 and Pain-NRS. The correlations are given as Spearman’s correlation coefficient (r) values
Comparative subscales | Expected correlation | Realized correlation | |
|---|---|---|---|
KOOS Pain | WOMAC Pain | r = > 0.79 (very strong) | r = 0.81, supported |
KOOS Symptoms | WOMAC Stiffness | r = 0.40 to 0.79 (moderate - strong) | r = 0.48, supported |
KOOS ADL | WOMAC Physical function | r = > 0.79 (very strong) | r = 0.86, supported |
KOOS Pain | SF-36 Bodily Pain | r = 0.60 to 0.79 (strong) | r = 0.69, supported |
KOOS ADL | SF-36 Physical Functioning | r = > 0.79 (very strong) | r = 0.83, supported |
KOOS Sport/Rec | SF-36 Physical Functioning | r = 0.60 to 0.79 (strong) | r = 0.67, supported |
KOOS Pain | Knee Pain-NRS | r = > 0.79 (very strong) | r = 0.66, not supported |
KOOS ADL | Knee Pain-NRS | r = 0.60 to 0.79 (strong) | r = 0.68, supported |
KOOS QOL | Knee Pain-NRS | r = 0.40 to 0.59 (moderate) | r = 0.53, supported |