Orthopedics, Hôpital Saint Antoine, Paris, France.
Int Orthop. 2012 Aug;36(8):1655-60. doi: 10.1007/s00264-012-1579-5. Epub 2012 Jun 1.
Smartphones have gained widespread use in the healthcare field to fulfill a variety of tasks. We developed a small iPhone application to take advantage of the built-in position sensor to measure angles in a variety of spinal deformities. We present a reliability study of this tool in measuring kyphotic angles.
Radiographs taken from 20 different patients' charts were presented to a panel of six operators at two different times. Radiographs were measured with the protractor and the iPhone application and statistical analysis was applied to measure intraclass correlation coefficients between both measurement methods, and to measure intra- and interobserver reliability
The intraclass correlation coefficient calculated between methods (i.e. CobbMeter application on the iPhone versus standard method with the protractor) was 0.963 for all measures, indicating excellent correlation was obtained between the CobbMeter application and the standard method. The interobserver correlation coefficient was 0.965. The intraobserver ICC was 0.977, indicating excellent reproductibility of measurements at different times for all operators. The interobserver ICC between fellowship trained senior surgeons and general orthopaedic residents was 0.989. Consistently, the ICC for intraobserver and interobserver correlations was higher with the CobbMeter application than with the regular protractor method. This difference was not statistically significant.
Measuring kyphotic angles with the iPhone application appears to be a valid procedure and is in no way inferior to the standard way of measuring the Cobb angle in kyphotic deformities.
智能手机在医疗保健领域得到了广泛的应用，可以完成各种任务。我们开发了一个小型的 iPhone 应用程序，利用内置的位置传感器来测量各种脊柱畸形的角度。我们提出了一项该工具测量后凸角的可靠性研究。
从 20 名不同患者的图表中选取的 X 光片，由六名操作人员在两个不同时间进行评估。X 光片通过量角器和 iPhone 应用程序进行测量，并应用统计分析来测量两种测量方法之间的组内相关系数，并测量观察者内和观察者间的可靠性。
方法之间（即 iPhone 上的 CobbMeter 应用程序与量角器的标准方法）的组内相关系数为 0.963，表明 CobbMeter 应用程序与标准方法之间获得了极好的相关性。观察者间相关系数为 0.965。观察者内 ICC 为 0.977，表明所有操作人员在不同时间测量的重复性极好。 fellowship 培训的高级外科医生和普通骨科住院医师之间的观察者间 ICC 为 0.989。一致地，CobbMeter 应用程序的观察者内和观察者间相关性的 ICC 高于常规量角器方法。这种差异无统计学意义。
使用 iPhone 应用程序测量后凸角似乎是一种有效的方法，而且在测量后凸畸形的 Cobb 角方面并不逊于标准方法。
