表 4.

Comparison of Cobb angle between the two groups before and after operation ( )

两组手术前后Cobb角比较（ ）

组别 Group	例数 n	术前 Preoperative	术后2周 Two weeks after operation	末次随访 Last follow-up
n-HA/PA66组 n-HA/PA66 group	23	23.63±3.54	12.64±2.53	7.20±1.50
自体髂骨组 Autologous iliac bone group	25	22.13±3.40	11.84±2.12	6.86±1.59
统计值 Statistic		时间效应F=365.947，P=0.000 交互效应F=0.495，P=0.613 组别效应F=3.718，P=0.060