Prognostic factors for Anterior Knee Pain Scale at 3 and 12 months
| 3 months | 12 months | |||
|---|---|---|---|---|
| Variables | β (95%CI) | p Value | β (95% CI) | p Value |
| Age | ||||
| Gender | ||||
| Body mass index | ||||
| Duration of complaints (ref=1–2 months) | ||||
| 2–6 months | −8.75 (−13.46 to −4.04) | <0.001 | ||
| 6–12 months | −5.35 (−9.76 to −0.94) | 0.021 | −10.02 (−15.16 to −4.87) | <0.001 |
| 12+ months | −4.44 (−8.17 to −0.71) | 0.024 | −11.33 (−15.96 to −6.71) | <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 | −0.099 (−0.18 to −0.02) | 0.015 | ||
| Baseline worse/on activity pain | ||||
| Anterior Knee Pain (AKP) Scale | 0.56 (0.44 to 0.67) | <0.001 | 0.37 (0.24 to 0.49) | <0.001 |
| Functional Index Questionnaire | ||||
| R2 | 0.330 | 0.317 | ||
| AUC (cut-off AKP at follow-up 90) | 0.550 | 0.656 | ||
| AUC (cut-off AKP at follow-up 80) | 0.675 | 0.304 | ||
| AUC (cut-off AKP at follow-up 60) | 0.101 | 0.085 | ||
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.