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Table 3 Comparison of VAS 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 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