Ethnic Variations in Radiographic Parameters and SRS-22 Scores in Adult Spinal Deformity

作者：Naobumi Hosogane, Christopher Pearson Ames, Morio Matsumoto, Mitsuru Yagi, Yukihiro Matsuyama, Hiroshi Taneichi, Yu Yamato, Daisaku Takeuchi, Frank J. Schwab, Christopher I. Shaffrey, Justin S. Smith, Shay R. Bess, Virginie Lafage · 发表于：Clinical Spine Surgery A Spine Publication · 年份：2018 · DOI：10.1097/bsd.0000000000000610 · 被引用次数：8 · 研究领域：Scoliosis diagnosis and treatment、Spine and Intervertebral Disc Pathology、Cervical and Thoracic Myelopathy

STUDY DESIGN: Retrospective review of North American and Japanese adult spinal deformity (ASD) database. OBJECTIVE: To investigate the ethnical differences in radiographic parameters and Scoliosis Research Society (SRS)-22 between North American and Japanese ASD. SUMMARY OF BACKGROUND DATA: Previous comparison study between North American and Japanese ASD patients has revealed Japanese patients had marked pelvic tilt deformity and had lower Oswestry Disability Index scores corresponding to established thresholds of radiographic deformity. However, the subjects of the previous study included relatively younger ASD patients (above 18 y) of idiopathic origin. MATERIALS AND METHODS: Total 282 ASD patients older than 50 years, 211 patients from North America (United States) and 71 patients from Japan (JP), with minimum 2-year follow-up postoperatively were included in the study. Radiologic parameters were compared at the baseline and at 2-year follow-up. SRS-22 score was used for the comparison of clinical outcome. RESULTS: At baseline, Japan showed significantly worse sagittal alignment such as smaller lumbar lordosis (LL), larger pelvic incidence (PI), and larger sagittal vertical axis than United States. However, Japan had significantly fewer levels fused than United States (US, 12.66±4.6; JP, 8.49±2.7). At 2 years after the surgery, Japan still had significantly worse residual sagittal deformity. Comparison of SRS-22 scores revealed Japan had better pain but worse functional d...