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Table 2 Comparison of Harris scores at pre- and post-operation between 2 groups \( \left(\overline{x}\pm s\right) \)

From: The direct anterior approach for simultaneous bilateral total hip arthroplasty: a short-term efficacy analysis

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