|  | Week | ||||||
---|---|---|---|---|---|---|---|---|
 |  | 0 | 6 | 12 | 18 | 24 | 6-24 | |
Arthritis self-efficacy measures | Â | Â | Â | Â | Â | Â | Â | Â |
   Pain | 25 th | 45.00 | 53.50 | 58.50 | 60.50 | 70.00 | z | 2.64 |
 | Median | 55.00 | 69.00a | 72.00 | 71.00 | 80.00d | P | 0.01 |
 | 75 th | 72.00 | 75.50 | 86.00 | 90.00 | 91.50 | r | 0.35 |
   Function | 25 th | 58.89 | 68.61 | 72.50 | 74.17 | 73.61 | z | 1.91 |
 | Median | 74.44 | 79.44 | 86.67 | 88.33 | 88.89 | P | 0.06 |
 | 75 th | 89.44 | 89.72 | 94.72 | 92.22 | 94.17 | r | 0.26 |
   Other symptoms | 25 th | 43.75 | 57.08 | 70.42 | 73.33 | 78.75 | z | -2.96 |
 | Median | 61.67 | 68.33a | 78.33b | 83.33 | 85.83d | P | <0.001 |
 | 75 th | 80.00 | 86.25 | 87.92 | 89.58 | 90.00 | r | 0.40 |
Correlates of physical activity measures | ||||||||
   Self-regulation | 25 th | 23.25 | 19.50 | 34.00 | 33.38 | 30.75 | z | 3.69 |
 | Median | 30.00 | 27.00 | 38.00b | 39.00 | 39.00 | P | <0.001 |
 | 75 th | 34.00 | 36.50 | 45.00 | 48.25 | 47.25 | r | 0.49 |
   Self-efficacy | 25 th | 2.40 | 2.40 | 2.65 | 2.80 | 2.45 | z | 1.79 |
 | Median | 2.80 | 3.00 | 3.10b | 3.20 | 3.30 | P | 0.07 |
 | 75 th | 3.20 | 3.35 | 3.55 | 3.60 | 3.75 | r | 0.24 |
   Benefits | 25 th | 53.00 | 53.25 | 54.25 | 53.00 | 53.00 | z | -0.69 |
 | Median | 56.00 | 56.00 | 57.00 | 56.00 | 54.50 | P | 0.49 |
 | 75 th | 62.50 | 63.00 | 65.00 | 64.00 | 64.25 | r | 0.09 |
   Barriers | 25 th | 0.87 | 0.78 | 0.62 | 0.48 | 0.48 | z | -2.57 |
 | Median | 1.48 | 1.04a | 1.02 | 0.86 | 0.98 | P | 0.01 |
 | 75 th | 2.03 | 1.63 | 1.46 | 1.55 | 1.47 | r | 0.34 |
Anxiety and depression (Goldberg) | 25 th | 4.25 | 1.25 | 2.00 | 2.00 | 1.00 | z | -1.73 |
 | Median | 6.00 | 5.00 | 4.00 | 5.00 | 3.00 | P | 0.08 |
 | 75 th | 8.75 | 7.75 | 5.75 | 6.00 | 5.75 | r | 0.23 |
Weight (kg) | 25 th | 69.25 | 69.88 | 72.00 | 69.38 | 69.00 | z | -1.57 |
 | Median | 79.50 | 80.00 | 81.00b | 79.25c | 79.50d | P | 0.11 |
 | 75 th | 95.50 | 97.00 | 94.00 | 89.13 | 91.75 | r | 0.21 |