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Improvement of pain release in the case group and control group.
| Pre-operative VAS score | Post-operative VAS score | P-valueb | |
|---|---|---|---|
| Case group | 7.8±1.5 | 3.1±0.5 | <0.001* |
| Control group | 7.5±1.9 | 4.8±1.1 | <0.001* |
| P-valuea | 0.738* | <0.001* |
Using the rank sum test (Mann-Whitney test);
comparisons of the VAS score in the case group and the control group;
comparisons of the preoperative VAS score and the postoperative VAS score in the two groups.
