The reliability and validity of three non-radiological measures of thoracic kyphosis and their relations to the standing radiological Cobb angle.
The reliability and validity of three non-radiological measures of thoracic kyphosis and their relations to the standing radiological Cobb angle.
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DOI：
10.1007/s00198-010-1422-z
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发表时间：
2011-06
影响因子：
4
通讯作者：
Karlamangla, A. S.
中科院分区：
文献类型：
--
作者：
Greendale, G. A.;Nili, N. S.;Huang, M. -H.;Seeger, L.;Karlamangla, A. S.
后凸畸形与越来越多的负面结果有关，包括更高的死亡率。由于测量过程中固有的困难，后凸畸形的研究受到阻碍。通过展示三种脊柱后凸的临床测量方法适用于大规模的、纵向的、过度的后凸研究，我们将促进这一领域亟需的研究。本研究的目的是描述三种非放射学后凸测量方法(Debrunner后凸角、FlexiCurve后凸指数和FlexiCurve后凸角度)的可靠性，以及它们与Cobb角的有效性，并根据非放射学后凸测量近似Cobb角。我们分析了113名年龄为60岁的≥参与者的数据，后凸角度为≥40°。Cobb角在站立的胸腰椎侧位X线片上使用T4和T12的界限进行测量。后凸畸形的非放射学测量由一名评分者进行三次，第四次由盲目的第二评价者进行。非放射学评估的评价者内部和评价者间的可靠性很高(类内相关性在0.96到0.98之间)，并且彼此之间没有差异。估计效度的皮尔逊相关性在0.62到0.69之间，没有不同。Debrunner角接近Cobb角，标度因子为1.067，偏移量为5°。FlexiCurve后凸角必须按1.53的比例调整才能获得相当于Cobb角的角度。屈曲后凸指数与Cobb角的比例系数为315，偏移量为5°。与测量的Cobb角相比，使用非放射测量预测的Cobb角具有类似的震级误差(差异的标准偏差在10.24到11.26之间)。每个非放射学测量都有相似的信度和效度。低成本、易用性和对脊柱轮廓变化的稳健性为FlexiCurve在纵向后凸评估中的应用奠定了基础。所提供的近似换算系数将允许将非放射测量换算为柯布角。
Hyperkyphosis is implicated in a mounting list of negative outcomes, including higher mortality. Hyperkyphosis research is hindered due to difficulties inherent in its measurement. By showing that three clinical measures of kyphosis are suitable for use in large scale, longitudinal, hyperkyphosis studies, we will facilitate much needed research in this field. The objective of this study is to describe the reliability of three non-radiological kyphosis measures (Debrunner kyphosis angle, flexicurve kyphosis index, and flexicurve kyphosis angle) and their validity compared to the Cobb angle and to approximate a Cobb angle from non-radiological kyphosis measures. We analyzed data from 113 participants aged ≥60 years with kyphosis angle ≥40°. Cobb angle was measured on a standing lateral thoracolumbar radiograph using bounds at T4 and T12. Non-radiological measures of kyphosis were made three times by a single rater and a 4th time by a blinded second rater. Intra- and inter-rater reliabilities for non-radiological assessments were high (intra-class correlations of 0.96 to 0.98) and did not differ from each other. Pearson correlations, estimating validity, ranged from 0.62 to 0.69 and did not differ. The Debrunner angle was close to the Cobb angle, with scaling factor of 1.067 and an offset of 5°. The Flexicurve kyphosis angle had to be scaled by 1.53 to obtain the equivalent Cobb angle. The scaling factor for the Flexicurve kyphosis index to Cobb angle was 315, with an offset of 5°. Compared to the measured Cobb angle, Cobb angles predicted using the non-radiological measures had similar magnitude errors (standard deviations of the differences ranging between 10.24 and 11.26). Each non-radiological measurement had similar reliability and validity. Low cost, ease of use, and robustness to variations in spine contour argue for the Flexicurve in longitudinal kyphosis assessments. The approximate conversion factors provided will permit translation of non-radiological measures to Cobb angles.
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影响因子：
39.2
作者：
Kado DM;Lui LY;Ensrud KE;Fink HA;Karlamangla AS;Cummings SR;Study of Osteoporotic Fractures
通讯作者：
Study of Osteoporotic Fractures
DOI：
10.1097/00002517-200102000-00010
发表时间：
2001-02-01
期刊：
JOURNAL OF SPINAL DISORDERS
影响因子：
--
作者：
Korovessis, P;Petsinis, G;Baikousis, A
通讯作者：
Baikousis, A
影响因子：
3
作者：
Lundon, KMA;Li, AMWY;Bibershtein, S
通讯作者：
Bibershtein, S
影响因子：
4
作者：
McGrother, CW;Donaldson, MMK;Clarke, M
通讯作者：
Clarke, M
DOI：
10.1093/gerona/60.5.633
发表时间：
2005-05-01
影响因子：
5.1
作者：
Kado, DM;Huang, MH;Greendale, GA
通讯作者：
Greendale, GA