Champain S, Benchikh K, Nogier A, Mazel C, Guise J De, Skalli W
Laboratoire de Biomécanique, ENSAM-CNRS, 151, boulevard de l'Hôpital, 75013 Paris, France.
Eur Spine J. 2006 Jun;15(6):982-91. doi: 10.1007/s00586-005-0927-1. Epub 2005 Jun 17.
The objective of this study was to evaluate an X-ray films analysis software, i.e. to estimate the reliability and validity of clinical measurements by means of this software. The authors first performed tests of precision and reproducibility of measures. The precision for dynamic modules was estimated at +/-2 degrees for the lumbar analysis and +/-3 degrees for the cervical one. Mean reproducibility coefficients calculated for postural modules are about 4 degrees for the angular parameters and 3 mm for the linear ones. We also evaluated clinical applicability of the software through its validity. Reference values calculated on a population of healthy subjects showed agreement with the literature. Then, when analysing postural X-ray films of severe scoliotic patients, we found that inter-observer reproducibility coefficients show a lower reliability of measurements; the main cause seems to be the low visibility of anatomic landmarks due to the quality of X-ray films and to the degree of deformity. This study allowed to better estimate the reliability and the usefulness of this tool, allowing for multicentric studies and exchanges.
本研究的目的是评估一款X线片分析软件，即通过该软件估计临床测量的可靠性和有效性。作者首先进行了测量的精密度和可重复性测试。腰椎分析中动态模块的精密度估计为±2度，颈椎分析为±3度。姿势模块计算出的平均可重复性系数，角度参数约为4度，线性参数为3毫米。我们还通过软件的有效性评估了其临床适用性。在健康受试者群体上计算出的参考值与文献一致。然后，在分析重度脊柱侧弯患者的姿势X线片时，我们发现观察者间的可重复性系数显示测量的可靠性较低；主要原因似乎是由于X线片质量和畸形程度导致解剖标志的可视性较差。这项研究有助于更好地估计该工具的可靠性和实用性，为多中心研究和交流提供了可能。
