. 2017 Jun;31(6):670–676. [Article in Chinese] doi: 10.7507/1002-1892.201702096

表 1.

Comparison of VAS scores between two groups at pre- and post-operation ( Inline graphic )

两组患者手术前后 VAS 评分比较（ Inline graphic ）

组别 Group	例数 n	术前 Preoperative	术后 3 个月 Three months after operation	末次随访 Last follow-up	统计值 Statistic
^* 与术前比较 P<0.05，^# 与术后 3 个月比较 P<0.05 ^* Compared with the preoperative value, P<0.05;^# compared with the value at 3 months after operation, P<0.05
A	30	7.867±1.756^#	2.533±1.634^*	1.900±1.348^*	F=122.796 P= 0.000
B	20	8.150±1.899^#	2.450±1.701^*	2.050±1.638^*	F=72.771 P= 0.000
统计值 Statistic		t=–0.541 P= 0.591	t=0.174 P=0.863	t=–0.354 P= 0.725