| Preoperative | Postoperative | Difference | ||
|---|---|---|---|---|
| Pain | 2 | 4 | 2 × 2 = 4 | = 7 fair result |
| Mobility | 6 | 5 | −1 | |
| Ability to walk | 3 | 5 | 2 × 2 = 4 | |
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