Table 4.
Results of the subgroup analysis.
| Outcome | Factors | Subgroup | MD (95% CI) | I 2 (%) | p (Heterogeneity) | p‐value |
|---|---|---|---|---|---|---|
| Kujala score | Follow‐up time | >40 months | 3.04 (1.74, 4.34) | 0 | =0.76 | < 0.01 |
| <40 months | 1.74 (−0.85, 4.34) | 88 | <0.01 | =0.19 | ||
| Research type | RCT | 3.04 (1.74, 4.34) | 0 | =0.76 | <0.01 | |
| CS | 1.74 (−0.85, 4.34) | 88 | <0.01 | =0.19 | ||
| Knees | ≥80 | 2.75 (1.54, 3.96) | 0 | =0.57 | <0.01 | |
| <80 | 1.88 (−1.05, 4.81) | 90 | <0.01 | =0.21 | ||
| Lysholm score | Follow‐up time | >40 months | −1.37 (−5.40, 2.65) | 62 | =0.11 | =0.50 |
| <40 months | 2.15 (0.23, 4.06) | 23 | =0.27 | =0.03 | ||
| Research type | RCT | 0.47 (−3.87, 4.81) | 74 | =0.02 | =0.83 | |
| CS | 2.53 (1.05, 4.01) | 40 | =0.19 | <0.01 | ||
| IKDC score | Knees | ≤80 | 5.28 (−6.09, 16.64) | 84 | =0.01 | =0.36 |
| >80 | 5.00 (3.66, 6.33) | 0 | =0.43 | <0.01 |
Abbreviations: CI, confidence intervals; CS, cohort studies; IKDC, International Knee Documentation Committee; MD, mean differences; RCT, randomized controlled trials.