The change of JOA score between pre-operation and post operation, operation time, blood loss, the incidence of low back pain and fusion effects in radiographs were checked by statistic method.

• 对患者术前及随访时症状进行JOA评分，不同术式手术出血量、手术时间、术前及随访时JOA评分改善程度、术后下腰痛发生率和手术节段融合效果进行统计学分析。