Participant demographics and baseline scores. Values are mean (standard deviation) and (range) unless otherwise stated (n=138)
| Mean (SD) (range) | |
| Women, number (%) | 88 (64) |
| Age (years) | 38.6 (10.3) (19–66) |
| Age≥40 years, number (%) | 52 (38) |
| Body mass index (kg/m2) | 25.7 (4.6) (17.5–42.5) |
| KOOS-PF* | 55.1 (19.0) (15.9–95.5) |
| KOOS-Pain | 71.8 (16.2) (30.6–97.2) |
| KOOS-Symptoms | 73.0 (13.5) (42.9–96.4) |
| KOOS-Activities of Daily Living | 80.4 (15.6) (25.0–100.0) |
| KOOS-Sport and Recreation | 49.1 (28.7) [0.0–100.0) |
| KOOS-Quality of Life | 48.5 (17.7) (6.25–87.5) |
| AKPS | 71.0 (12.3) (32.0–96.0) |
AKPS, Anterior Knee Pain Scale; KOOS, Knee injury and Osteoarthritis Outcome Score; KOOS-PF, Patellofemoral pain and osteoarthritis subscale.
*KOOS scores are based on n=132 due to missing data/invalid subscales.
Phase 2: item reduction.