Prognostic factors for Functional Index Questionnaire score at 3 and 12 months
| 3 months | 12 months | |||
|---|---|---|---|---|
| Variables | β (95%CI) | p Value | β (95% CI) | p Value |
| Age | ||||
| Gender | −0.71 (−1.35 to −0.07) | 0.03 | ||
| Body mass index | ||||
| Duration of complaints (ref=1–2 months) | ||||
| 2–6 months | −1.56 (−2.58 to −0.53) | 0.03 | ||
| 6–12 months | −1.03 (−2.09 to 0.03) | 0.056 | ||
| 12+ months | −1.60 (−2.46 to −0.73) | <0.001 | ||
| Allocated preferred treatment (ref=no preference) | ||||
| Not allocated | ||||
| Allocated | ||||
| Recruitment | ||||
| Bilaterality | ||||
| Work type (ref = not employed) | ||||
| Sedentary | ||||
| Active | ||||
| Sport | ||||
| Baseline usual/rest pain | −0.02 (−0.03 to 0.002) | 0.08 | −0.02 (−0.04 to −0.01) | 0.013 |
| Baseline worse/on activity pain | ||||
| Anterior Knee Pain Scale | 0.06 (0.02 to 0.10) | 0.001 | 0.08 (0.05 to 0.11) | <0.001 |
| Functional Index Questionnaire | 0.27 (0.08 to 0.47) | 0.007 | ||
| R2 | 0.273 | 0.235 | ||
| AUC (cut-off FIQ at follow-up 12) | 0.509 | 0.405 | ||
| AUC (cut-off FIQ at follow-up 14) | 0.611 | 0.563 | ||
Variable ‘treatment’ not presented, but was included in final models (significant in 3-month and 12-month model).
Backward selection: p(IN)=0.05, p(OUT)=0.10.