Balg Frederic, Juteau Mathieu, Theoret Chantal, Svotelis Amy, Grenier Guillaume
Department of Orthopaedic Surgery, Faculty of Medicine and Health Science, University of Sherbrooke, and Centre de recherche du CHUS, Sherbrooke, QC, Canada.
J Pediatr Orthop. 2014 Dec;34(8):774-9. doi: 10.1097/BPO.0000000000000195.
This was a prospective blinded validity and reliability analysis.
The aim of this study was validation and reliability evaluation of the Scoligauge iPhone app.
The scoliometer is used to clinically measure the rib hump in scoliosis as a means to evaluate the axial trunk rotation. The increasing availability of smartphone with built-in accelerometer led to the development of a vast number of applications to measure angles. Of these, the Scoligauge mimics a scoliometer. The aim of this study was to compare the validity of the Scoligauge iPhone application without an associated adapter with the traditional scoliometer and to test the reliability of the application in a clinical setting.
Two observers measured the rib hump deformity on 34 consecutive patients with idiopathic scoliosis with an average Cobb angle of 24.2 ± 13.5 degrees (range, 4 to 65 degrees). Measurements were made with an iPhone without the adapter and with a scoliometer. The validity as well as the interobserver and intraobserver reliability were calculated using the intraclass coefficient (ICC) and the Bland-Altman test.
The mean difference between the scoliometer and the Scoligauge application was 0.4 degrees [95% confidence interval (CI) of ± 3.1 degrees] with an ICC of 0.947 (P < 0.001). The intraobserver and interobserver ICC were 0.961 (P < 0.001) and 0.901 (P < 0.001), respectively. The mean intraobserver difference was 0.0 degrees (95% CI of ± 2.7 degrees) and the mean interobserver difference was 0.1 degrees (95% CI of ± 4.4 degrees).
The intraobserver and interobserver reliability of the Scoligauge iPhone app, as well as its validity compared with the scoliometer, are excellent. The mean differences between measurements are small and clinically not significant. Thus, the Scoligauge application is valid for clinical evaluation even without special adapter.
Level I (Diagnostic Study).
这是一项前瞻性双盲有效性和可靠性分析。
本研究旨在验证Scoligauge iPhone应用程序的有效性并评估其可靠性。
脊柱侧凸测量仪用于临床测量脊柱侧凸中的肋骨隆凸，作为评估躯干轴向旋转的一种方法。随着内置加速度计的智能手机日益普及，催生了大量用于测量角度的应用程序。其中，Scoligauge模仿了脊柱侧凸测量仪。本研究的目的是比较不带相关适配器的Scoligauge iPhone应用程序与传统脊柱侧凸测量仪的有效性，并在临床环境中测试该应用程序的可靠性。
两名观察者对34例连续的特发性脊柱侧凸患者的肋骨隆凸畸形进行测量，这些患者的平均Cobb角为24.2±13.5度（范围为4至65度）。使用未配备适配器的iPhone和脊柱侧凸测量仪进行测量。使用组内相关系数（ICC）和Bland-Altman检验计算有效性以及观察者间和观察者内的可靠性。
脊柱侧凸测量仪与Scoligauge应用程序之间的平均差异为0.4度[95%置信区间（CI）为±3.1度]，ICC为0.947（P<0.001）。观察者内和观察者间的ICC分别为0.961（P<0.001）和0.901（P<0.001）。观察者内平均差异为0.0度（95%CI为±2.7度），观察者间平均差异为0.1度（95%CI为±4.4度）。
Scoligauge iPhone应用程序的观察者内和观察者间可靠性以及与脊柱侧凸测量仪相比的有效性都非常出色。测量之间的平均差异很小，在临床上不显著。因此，即使没有特殊适配器，Scoligauge应用程序也可用于临床评估。
I级（诊断性研究）。
