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. 2017 Aug 4;4(4):251–255. doi: 10.1093/rb/rbx019

Table 1.

Preoperative and postoperative back pain evaluation by VAS

Group Preoperative 3 days postoperatively 3 months postoperatively
A 8.75±2.11 3.77±1.14* 1.98±1.39*
B 8.45±1.90 3.24±1.15* 1.52±1.15*
t value 0.77 2.41 1.99
P value 0.69 0.02 0.05
*

P < 0.05 as shown by intragroup preoperative and postoperative comparison.