Purpose

To investigate the intra- and inter-observer reliabilities of the newly developed i-Scolioroller for scoliosis screening, and to determine the optimal i-Scolioroller measurement cutoff values for identifying adolescent scoliosis with a Cobb angle ≥ 20°.

Methods

The i-Scolioroller displays the right- and left-side maximum inclination angle (Rmax, Lmax) during the forward bending test (FBT), as well as the angle of trunk inclination (ATI, i.e., whether the Rmax or Lmax is greater). Sum-ATI is defined as the sum of Rmax and Lmax. Intra-class correlation coefficients (ICC) of the ATI and sum-ATI measurements were calculated to analyze the intra- and inter-observer reliabilities for 10 plaster torsos in FBT positions obtained from patients with idiopathic scoliosis. The optimal cutoff values for scoliosis were determined using receiver operating characteristic (ROC) analysis of i-Scolioroller measurements versus Cobb angles obtained from the upright whole-spine radiographs of 112 adolescent outpatients.

Results

The intra-observer ICCs for the ATI/sum-ATI for 3 observers were 0.851/0.856, 0.786/0.900, and 0.772/0.796, respectively, while the corresponding inter-observer ICCs for all participants were 0.733/0.745. On ROC analysis, an ATI of 8° was the optimal cutoff value for scoliosis (sensitivity and specificity: 79.2% and 70.0%, respectively). The optimal cutoff value for sum-ATI was 11° (sensitivity and specificity: 86.1% and 82.5%, respectively). The areas under the ROC curves were 0.859 for ATI and 0.908 for sum-ATI.

Conclusion

The optimal cutoff values for identifying scoliosis using the i-Scolioroller were a combination of 11° for the sum-ATI and 8° for the ATI.

中文翻译：

---

结合移动设备和手持滚轮检测脊柱畸形的新装置的评估：与躯干倾斜的左右角之和的关联。

目的

研究新开发的用于脊柱侧弯筛查的 i-Scoliroller 的观察者内部和观察者间的可靠性，并确定用于识别 Cobb 角 ≥ 20° 青少年脊柱侧弯的最佳 i-Scoliroller 测量截止值。

方法

i-Scolioroller 在前弯测试 (FBT) 中显示右侧和左侧最大倾角 (Rmax, Lmax)，以及躯干倾角（ATI，即 Rmax 或 Lmax 是否更大） . Sum-ATI 定义为 Rmax 和 Lmax 的总和。计算了 ATI 和 sum-ATI 测量值的类内相关系数 (ICC)，以分析从特发性脊柱侧弯患者获得的 FBT 位置的 10 个石膏躯干的观察者内和观察者间的可靠性。脊柱侧弯的最佳临界值是使用 i-Scolioroller 测量值与从 112 名青少年门诊患者的直立全脊柱 X 光片获得的 Cobb 角的受试者操作特征 (ROC) 分析来确定的。

结果

3 个观察者的 ATI/sum-ATI 的观察者内 ICC 分别为 0.851/0.856、0.786/0.900 和 0.772/0.796，而所有参与者的相应观察者间 ICC 为 0.733/0.745。在 ROC 分析中，8° 的 ATI 是脊柱侧弯的最佳临界值（敏感性和特异性分别为 79.2% 和 70.0%）。sum-ATI 的最佳截止值为 11°（敏感性和特异性分别为 86.1% 和 82.5%）。ROC 曲线下的面积对于 ATI 为 0.859，对于 sum-ATI 为 0.908。

结论

使用 i-Scoliroller 识别脊柱侧弯的最佳截止值是 sum-ATI 的 11° 和 ATI 的 8° 的组合。