L1 incidence reflects pelvic incidence and lumbar lordosis mismatch in sagittal balance evaluation.
L1 incidence reflects pelvic incidence and lumbar lordosis mismatch in sagittal balance evaluation.
复制标题
DOI：
10.1097/md.0000000000011668
复制
发表时间：
2018-07
期刊：
影响因子：
1.6
通讯作者：
Hwang CJ
中科院分区：
文献类型：
--
作者：
Choi SH;Son SM;Lee DH;Lee CS;Shin WC;Hong CG;Lee JS;Hwang CJ
回溯性研究。探讨L1发生率(L1I)和T1发生率(T1I)和T1发生率(T1I)之间的影像和几何关系。PI和LL之间的关系尚不清楚，这可能是因为缺乏一个直接的放射学参数来表示PI/LL不匹配。据我们所知，这是第一个关于代表PI/LL不匹配的直接放射学参数的报告。这项研究是对146名患者的回顾，他们接受了整个脊柱的正位和侧位站立位X线片。L1I定义为L1上终板垂直线与两个股骨头中心连线之间的夹角。T1i定义为与T1上终板垂直的直线与连接骶骨终板中点至两个股骨头中心的直线之间的夹角。用皮尔逊相关系数和线性回归分析对两者进行了验证。放射学测量的L1I和T1I分别与计算的ΔPI/Ll和ΔPI/Ll/Tk的平均值和标准差相吻合。L1I与ΔPI/Ll、T1i与ΔPI/Ll/Tk呈极显著正相关(分别为R = 0.997，P <； .01；R = 0.981，P <； .01)。在线性回归分析中，L1I的斜率和截距分别为0.991和−0.041，可预测性为99.4%(R2 = 0.994)；T1I的斜率和截距分别为0.990和−0.026，可预测性为99.0%(R2 = 0.990)。L1I和T1I分别与PI/L1错配和PI/L1/TK错配显著相关。L1i和T1i是表示PI/L1不匹配和PI/L1/Tk不匹配的直接参数。它们在分析矢状面平衡时会很有用。证据级别：3级
Retrospective study. To investigate the radiologic and geometrical association between L1 incidence (L1I) with pelvic incidence/lumbar lordosis (PI/LL) mismatch and T1 incidence (T1I) with PI/LL/thoracic kyphosis (TK) mismatch. The relationship between PI and LL is not clear, and it might be because of the absence of a direct radiologic parameter to represent PI/LL mismatch. To the best of our knowledge, this is the first report on a direct radiologic parameter for representing PI/LL mismatch. This study is a retrospective review of 146 patients who underwent anteroposterior and lateral standing radiographs of the whole spine. L1I was defined as the angle between the line perpendicular to the L1 upper endplate and the line connecting the midpoint of the sacral endplate to the center of both femoral heads. T1I was defined as the angle between the line perpendicular to the T1 upper endplate and the line connecting the midpoint of the sacral endplate to the center of both femoral heads. Both were validated using the Pearson correlation coefficient and linear regression analysis. Radiologically measured L1I and T1I were coterminous with calculated measurements of ΔPI/LL and ΔPI/LL/TK in terms of means and standard deviations, respectively. Excellent correlations were found between L1I and ΔPI/LL, and T1I and ΔPI/LL/TK (R = 0.997, P < .01; R = 0.981, P < .01, respectively). In linear regression analysis, the slope and intercept of L1I were 0.991 and −0.041, with a predictability of 99.4% (R2 = 0.994), and those of T1I were 0.990 and −0.026, with a predictability of 99.0% (R2 = 0.990), respectively. L1I and T1I were strongly correlated with PI/LL mismatch and PI/LL/TK mismatch, respectively. L1I and T1I are direct parameters that represent PI/LL mismatch and PI/LL/TK mismatch. They would be useful in analyzing sagittal balance. Level of evidence: Level 3