Analysis of sagittal balance and spinopelvic parameters in a brazilian population sample

Objective: To define the sagittal balance and spinopelvic parameters in a Brazilian population sample composed of asymptomatic volunteers. Methods: Fifty healthy adult individuals volunteered to participate in this study. The exclusion criteria included spinal deformity or improper radiograph study. In each radiograph exam in profile view, the sagittal balance and spinopelvic parameters were evaluated, including vertical sagittal axis, sacral slope, pelvic tilt and pelvic incidence. Results: The data obtained in this study are according to the values presented in the worldwide literature. None of the radiographic parameters showed any differences between the genders. Comparing the values presented in this study with those of other reports, with different populations, it was observed that: there was no significant difference in any of the pelvic parameters between Brazilian and Korean populations; there was a significant difference in pelvic incidence between Brazilian and European populations in a total sample (p=0.0001), in males (p=0.02), and in females (p=0.0007); there was a difference in sacral slope between Brazilian and European populations in a total sample (p=0.0140), and in females (p=0.005). Conclusion: There were no differences in any parameter in terms of gender. There were no differences in pelvic incidence between Brazilian and Korean populations. There was a difference in pelvic incidence between Brazilian and European populations, in the total sample and in males and females. There was a difference in sacral slope between Brazilian and European populations in a total sample, and in females.

研究目的：本研究旨在明确巴西无症状志愿者人群的矢状位平衡（sagittal balance）及脊柱骨盆参数（spinopelvic parameters）。
研究方法：本研究共招募50名健康成年志愿者自愿参与。本研究的排除标准包括脊柱畸形或X线影像检查不合格者。对每位受试者的侧位X线片进行评估，测量相关参数，包括垂直矢状轴（vertical sagittal axis）、骶骨倾斜角（sacral slope）、骨盆倾斜角（pelvic tilt）及骨盆入射角（pelvic incidence）。
研究结果：本研究所得数据与全球已发表文献的参考值一致。所有影像学参数均未表现出性别差异。将本研究结果与其他不同人群的研究报道进行对比后发现：巴西人群与韩国人群的各项骨盆参数均无显著差异；巴西人群与欧洲人群的骨盆入射角在总样本（p=0.0001）、男性亚组（p=0.02）及女性亚组（p=0.0007）中均存在显著差异；巴西人群与欧洲人群的骶骨倾斜角在总样本（p=0.0140）及女性亚组（p=0.005）中存在差异。
研究结论：所有参数均未表现出性别差异。巴西人群与韩国人群的骨盆入射角无显著差异。巴西人群与欧洲人群的骨盆入射角在总样本、男性及女性亚组中均存在显著差异。巴西人群与欧洲人群的骶骨倾斜角在总样本及女性亚组中存在差异。