Table 8.
Subgroup Analyses for Symptom Duration.
| Author | N | Follow-Up (Months) | Outcome Variable | Subgroup 1 | Subgroup 2 | Mean Subgroup 1 | Mean Subgroup 2 | Results |
|---|---|---|---|---|---|---|---|---|
| Asik et al.30 | 90 | 68.0 | Lysholm Oxford | Symptom duration ≤12 months | Symptom duration >12 months | Not reported | Not reported | n.s. |
| Salzmann et al.45 | 145 | 50.4 | IKDC Lysholm NAS-P NAS-F |
Symptom duration <18 months | Symptom duration >18 months | 78.4 83.3 7.4 7.1 |
68.3 71.4 6.0, 5.9 |
0.001 0.001 0.003 0.003 |
| Solheim et al.46 | 120 | 12-216 | Lysholm VAS | Symptom duration ≥ 36 months | Symptom duration < 36 months | Not reported | Not reported | Shorter symptom duration: P = 0.005 OR: 2.45 |
OR = odds ratio; IKDC = International Knee Documentation Committee; NAS-P = Numeric Analogue Scale for Pain; NAS-F = Numeric Analogue Scale for Function; VAS = Visual Analogue Scale.