. 2019 Mar;33(3):287–295. [Article in Chinese] doi: 10.7507/1002-1892.201807060

表 2.

Comparison of intervertebral height of fusion segments between 2 groups (mm, Inline graphic )

两组各时间点融合节段椎间隙高度比较（mm， Inline graphic ）

组别 Group	节段 n	术前 Preoperative	术后 3 d Three days after operation	术后 6 个月 Six 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 d 比较 P<0.05，^△与术后 6 个月比较P<0.05 ^Compared with preoperative value, P<0.05;^#compared with the value at 3 days after operation, P<0.05;^△compared with the value at 6 months after operation, P<0.05
单节段组 Single-level group	18	9.01±2.60^#^△	11.47±1.83^*	11.26±1.59^*	11.05±1.40^*	F= 8.333 P= 0.004
双节段组 Double-level group	50	8.58±2.14^#^△	12.91±2.60^*	12.52±2.05^*	12.37±1.52^*	F=54.886 P= 0.000
统计值 Statistic		t=0.572 P=0.570	t=–1.818 P= 0.076	t=–1.977 P= 0.054	t=–2.698 P= 0.010