Table 2 Comparison of Harris scores at pre- and post-operation between 2 groups \( \left(\overline{x}\pm s\right) \)
Group | n | Preoperative | One month after operation | Three months after operation | Last follow-up |
|---|---|---|---|---|---|
A | 46 | 41.0 ± 2.6 | 61.8 ± 4.4 | 84.1 ± 6.8 | 90.9 ± 5.3 |
B | 43 | 42.0 ± 3.2 | 57.4 ± 6.3 | 80.9 ± 5.9 | 89.6 ± 5.2 |
Statistic evaluation | t = −1.615 p = 0.114 | t = −3.586 p = 0.01 | t = − 2.148 p = 0.037 | t = − 1.112 p = 0.273 |