Table 3 Comparison of VAS scores at pre- and post-operation between 2 groups \( \left(\overline{x}\pm s\right) \)
Group | n | Preoperative | Three days after operation | Last follow-up |
|---|---|---|---|---|
A | 46 | 6.5 ± 1.7 | 2.6 ± 0.9 | 1.1 ± 0.9 |
B | 43 | 6.1 ± 1.5 | 3.3 ± 1.4 | 1.4 ± 1.2 |
Statistic evaluation | t = − 1.294 p = 0.203 | t = − 2.960 p = 0.005 | t = −1.355 p = 0.183 |