表 1.

Comparison of clinical effectiveness indicators at various time points between the two groups

两组患者各时间点临床疗效指标比较

组别 Group	例数 n	颈肩痛VAS评分 VAS score of neck and shoulder pain
		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	改善率（平均秩次） Improvement rate (mean rank)
研究组 Study group	16	4.1±0.9	1.7±0.9	1.1±0.6	0.6±0.5	20.90
对照组 Control group	19	3.8±0.8	1.5±0.8	1.1±0.7	0.8±0.6	14.82
统计值 Statistic		时间效应F=136.407，P<0.001 交互效应F=0.613，P=0.608 组间效应F=0.118，P=0.733				Z=−1.832 P=0.068