Scale | Baseline | Week 1 | Week 12 | |||
---|---|---|---|---|---|---|
Item scalability coefficient | Test scalability coefficient | Item scalability coefficient | Test scalability coefficient | Item scalability coefficient | Test scalability coefficient | |
Common scale (16 items) | 0.37–0.69 | 0.60 | 0.40–0.74 | 0.66 | 0.53–0.80 | 0.73 |
Joint pain (7 items) | 0.77–0.82 | 0.79 | 0.82–0.87 | 0.84 | 0.86–0.89 | 0.88 |
Joint stiffness (4 items) | 0.64–0.71 | 0.68 | 0.59–0.71 | 0.65 | 0.74–0.80 | 0.76 |
Impact (5 items) | 0.44–0.56 | 0.50 | 0.50–0.58 | 0.55 | 0.65–0.71 | 0.68 |