Characteristics of participants with PDPS with faster and slower disappearance of symptoms
| Characteristics | Fast disappearance (≤10 min) | Slow disappearance (>10 min) | P value | ES |
| Participants, n (%) | 25 (57) | 19 (43) | n/a | n/a |
| Female, n (%) | 16 (64) | 14 (74) | 0.534 | Phi=0.10 |
| Age (years) | 22.0 (IQR 6.0) | 20.0 (IQR 5.0) | 0.229 | r=0.18 |
| BMI (kg/m2) | 24.1 (IQR 4.1) | 22.4 (IQR 5.0) | 0.112 | r=0.24 |
| Sport participation (h/week) | 3.6 (SD±2.0, R 7.0) | 2.3 (SD±1.9, R 6.0) | 0.036 | d=0.66 |
| Tegner Score (0–10) | 4.0 (IQR 3.0) | 3.0 IQR (2.0) | 0.197 | r=0.19 |
| VAS-W (0–10) | 5.0 (IQR 3.0) | 6.0 (IQR 2.0) | 0.379 | r=0.13 |
| Bilateral PFP, n (%) | 17 (68) | 17 (90) | 0.148 | Phi=0.25 |
| Symptom duration (months) | 36.0 (IQR 54.5) | 42.0 (IQR 60.0) | 0.406 | r=0.13 |
| AKPS (0–100) | 74.0 (IQR 16.0) | 67.0 (IQR 12.0) | 0.005 | r=0.43 |
| TSK (17–68) | 32.0 (IQR 8.0) | 33.0 (IQR 14.0) | 0.374 | r=0.13 |
| VAS-W sitting (0–10) | 5.0 (IQR 4.0) | 6.0 (IQR 2.0) | 0.156 | r=0.21 |
Data are presented as numbers (percentages), mean (±SD and range (R)) or median (IQR 25%–75%).
AKPS, Anterior Knee Pain Scale; BMI, body mass index; ES, effect size; h/week, hours per week; n, number; n/a, not applicable; PFP, patellofemoral pain; TSK, Tampa Scale for Kinesiophobia; VAS-W, Visual Analogue Scale for Worst pain.