Study Design. A cross-sectional study to ealuate the long-term result of posterolateral (PLF), anterior (AF), and circumferential fusion (CF) for isthmic spondylolisthesis.

• 研究设计：通过一项横向研究，评价后外侧（PLF）、前方（AF）和环周融合（CF）治疗峡部裂型脊柱滑脱症的长期结果。