表 1.

Comparison of patellar score between 2 groups at pre- and post-operation ( )

两组患者手术前后髌骨评分比较（ ）

组别 Group	例数 n	术前 Preoperative	术后 24 个月 Twenty-four months after operation	统计值 Statistic
试验组 Trial group	64	11.6±3.9	26.8±3.2	t=28.598 P= 0.000
对照组 Control group	62	11.5±2.8	26.7±3.8	t=25.356 P= 0.000
统计值 Statistic		t=0.165 P=0.869	t=0.160 P=0.873