表 1.

Comparison of JOA score, VAS score, and spinal cord drift of cervical spine between the two groups before and after operation (n=40, )

两组患者手术前后颈椎 JOA 评分、VAS 评分以及脊髓漂移程度比较（n=40， ）

组别 Group	JOA 评分 JOA score					VAS 评分 VAS score				脊髓漂移程度（mm） Spinal cord drift (mm)
	术前 Preoperative	术后 12 个月 Postoperative at 12 months	差值 Difference	统计值 Statistic		术前 Preoperative	术后 12 个月 Postoperative at 12 months	差值 Difference	统计值 Statistic
观察组 Observation group	8.7±1.4	12.8±2.0	4.1±2.4	t=−10.372 P=0.008		2.9±1.9	1.8±1.3	−0.4±2.3	t=0.738 P=0.000	4.86±0.98
对照组 Control group	9.1±1.5	12.7±1.8	3.6±2.1	t=−9.503 P=0.008		2.4±2.0	2.2±1.3	−1.1±2.2	t=2.879 P=0.004	4.78±1.04
统计值 Statistic	t=1.359 P=0.510	−	t=−1.051 P=0.322			t=0.978 P=0.466	−	t=−1.251 P=0.607		t=−0.353 P=0.594