Demographics at each measurement occasion. Values are mean (SD) unless otherwise specified.
| Variables | Baseline | Week 12 | Week 26 | Week 52 |
|---|---|---|---|---|
| BMI | 30.24 (6.1) | 30.3 (6.47) | 30.24 (6.2) | 30.48 (7.08) |
| Pain, VAS 100 mm | 42.61 (23.03) | 32.59 (23.82) | 31.39 (24.52) | 27.96 (21.87) |
| 6MWT distance | 418.41 (116.92) | 455.39 (113.14) | 462.38 (117.59) | 465.15 (121.03) |
| WJR/not WJR, n | 119/150 | 122/150 | 122/150 | 78/106 |
| Unilateral/bilateral symptoms, n | 174/95 | 175/97 | 175/97 | 118/66 |
| KOOS pain | ||||
| No. participants | 269 | 272 | 272 | 184 |
| Male/female, n | 84/185 | 84/188 | 84/188 | 58/126 |
| Mean (SD) | 47.56 (18.66) | 53.61 (17.99) | 57.01 (18.84) | 58.91 (19.41) |
| KOOS other symptoms | ||||
| No. participants | 269 | 272 | 272 | 184 |
| Male/female, n | 84/185 | 84/188 | 84/188 | 58/126 |
| Mean (SD) | 47.31 (19.57) | 52.69 (18.54) | 53.98 (19.67) | 56.19 (19.88) |
| KOOS ADL | ||||
| No. participants | 272 | 272 | 272 | 184 |
| Male/female, n | 84/188 | 84/188 | 84/188 | 58/126 |
| Mean (SD) | 49.37 (20.2) | 56.25 (19.61) | 58.75 (20.62) | 59.87 (20.11) |
| KOOS sport and recreation | ||||
| No. participants | 190 | 203 | 204 | 142 |
| Male/female, n | 68/123 | 73/130 | 70/134 | 50/32 |
| WJR/not WJR, n | 73/118 | 78/125 | 74/130 | 53/89 |
| Unilateral/bilateral symptoms, n | 127/64 | 134/69 | 128/76 | 91/51 |
| Mean (SD) | 27.9 (21.07) | 29.65 (20.39) | 31.4 (21.56) | 32.29 (21.51) |
| KOOS quality of life | ||||
| No. participants | 244 | 254 | 260 | 171 |
| Male/female, n | 80/164 | 80/174 | 79/181 | 57/114 |
| WJR/not WJR, n | 100/144 | 109/145 | 113/147 | 68/103 |
| Unilateral/bilateral symptoms, n | 158/86 | 166/88 | 169/91 | 107/64 |
| Mean (SD) | 29.95 (15.8) | 37.86 (17.67) | 47.32 (18.39) | 47.58 (15.79) |
BMI: body mass index; VAS: visual analog scale; 6MWT: 6-min walk time; WJR: waitlisted for joint replacement; KOOS: Knee injury and Osteoarthritis Outcome Score; ADL: activities of daily living.