表 2.

Comparison of imaging indicators at various time points between the two groups (°, )

两组患者各时间点影像学指标比较（°，）

组别 Group	例数 n	上位相邻节段活动度 Upper adjacent segment range of motion					手术节段活动度 Surgical segment range of motion
		术前 Preoperative	术后 3个月 Postoperative at 3 months	术后 12个月 Postoperative at 12 months	末次随访 Last follow-up		术前 Preoperative	术后 3个月 Postoperative at 3 months	术后 12个月 Postoperative at 12 months	末次随访 Last follow-up
研究组 Study group	27	10.02±3.04	7.47±2.00	9.59±2.06	9.94±1.75		7.85±1.81	9.64±1.95	9.90±2.43	9.81±1.65
对照组 Control group	29	10.07±2.69	9.51±2.37	11.04±1.95	11.51±1.73		7.26±1.49	0	0	0
统计值 Statistic		时间效应F=27.032，P<0.001 交互效应F=5.249，P=0.006 组间效应F=6.402，P=0.014					时间效应F=54.976，P<0.001 交互效应F=163.718，P<0.001 组间效应F=947.497，P<0.001