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| Study | Outcome | Effect estimate | Participants |
| Pozos‐Guillen 2007 | Early acute postoperative pain | MD ‐1.20, 95% CI ‐1.75 to ‐0.65 | 40 |
| Pozos‐Guillen 2007 | Late acute postoperative pain | MD ‐2.10, 95% CI ‐2.57 to ‐1.63 | 40 |
CI: confidence interval MD: mean difference
