Elfiky Tarek, Patil Nirmal, Shawky Mohamed, Siam Ahmed, Ragab Raafat, Allam Yasser
Spine Unit, Elhadra University Hospital, Alexandria, Egypt.
Seth GS Medical College and KEM Hospital, Mumbai, India.
Neurospine. 2020 Mar;17(1):304-311. doi: 10.14245/ns.1938260.130. Epub 2020 Feb 1.
The objective was to compare Cobb angle measurements performed using an Oxford Cobbmeter and digital computer software (Surgimap) in a series of 83 adolescent idiopathic scoliosis (AIS) patients.
Two independent observers measured the Cobb angles for 123 curves on 83 consecutive long radiographs of patients with AIS using both Oxford Cobbmeter and digital computer software (Surgimap). The measurements were repeated a week. Curves were classified according to the severity into mild, moderate, and severe. The results were statistically analyzed for intraobserver and interobserver reliability.
The mean Cobb angle was 48.12° ± 19.75° (range, 10.54°-110.76°). Globally the results of curve measurements were comparable between and within both observers using both methods, with small mean differences. According to intraclass correlation coefficient, there was high inter- and intraobserver high agreement for both methods. All readings were > 0.9. There was a good interobserver (κ = 0.745, 0.693) and a very good interobserver agreement (κ = 0.810, 0.804) for both methods for curve classification. However, poor agreement was observed as regards to the measurement time, being less with Oxford Cobbometer.
The results of this study indicate that the Surgimap digital computer software measurement is an equivalent measuring tool to the Oxford Cobbmeter in Cobb angle measurement. Both have high intra and interobserver agreement for measurement and for curve classification, with small measurement differences. Oxford Cobbmeter is advantageous in being quicker, and therefore it is the method of choice for manual measurement, where PACS (patient archiving and communication system) or digital system is not available.
比较使用牛津 Cobb 角测量仪和数字计算机软件（Surgimap）对 83 例青少年特发性脊柱侧凸（AIS）患者进行 Cobb 角测量的结果。
两名独立观察者使用牛津 Cobb 角测量仪和数字计算机软件（Surgimap），对 83 例 AIS 患者连续的 123 张长片 X 光片上的 Cobb 角进行测量。测量在一周后重复进行。根据严重程度将曲线分为轻度、中度和重度。对结果进行统计学分析，以评估观察者内和观察者间的可靠性。
平均 Cobb 角为 48.12°±19.75°（范围为 10.54°-110.76°）。总体而言，两种方法在两名观察者之间以及观察者内部的曲线测量结果具有可比性，平均差异较小。根据组内相关系数，两种方法在观察者间和观察者内均具有高度一致性。所有读数均>0.9。两种方法在曲线分类方面观察者间一致性良好（κ = 0.745, 0.693），观察者内一致性非常好（κ = 0.810, 0.804）。然而，在测量时间方面一致性较差，牛津 Cobb 角测量仪所需时间更少。
本研究结果表明，在 Cobb 角测量中，Surgimap 数字计算机软件测量是与牛津 Cobb 角测量仪等效的测量工具。两者在测量和曲线分类方面观察者内和观察者间一致性都很高，测量差异较小。牛津 Cobb 角测量仪的优势在于速度更快，因此在没有 PACS（患者存档和通信系统）或数字系统的情况下，它是手动测量的首选方法。
