. 2019 Jul;33(7):807–813. [Article in Chinese] doi: 10.7507/1002-1892.201903096

表 1.

Comparison of VAS score of low back pain between the two groups at pre- and post-operation ( Inline graphic )

两组手术前后腰痛VAS评分比较（ Inline graphic ）

组别 Group	例数 n	术前 Preoperative	术后 2 d Two days after operation	术后 3 个月 Three months after operation	术后 6 个月 Six months after operation	术后 12 个月 Twelve months after operation	统计值 Statistic
^与术前比较 P<0.05 ^Compared with preoperative value, P<0.05
U	36	4.9±1.5	3.7±1.6^*	2.8±1.3^*	2.0±1.2^*	1.6±1.1^*	F=47.936 P= 0.000
B	34	5.1±1.4	3.8±1.5^*	2.9±1.3^*	1.9±1.0^*	1.4±1.1^*	F=63.417 P= 0.000
统计值 Statistic		t=–0.642 P= 0.523	t=–0.421 P= 0.675	t=–0.254 P= 0.801	t=0.221 P=0.825	t=0.551 P=0.583