Hasegawa Masaki, Suzuki Taku, Kuroiwa Takashi, Oka Yusuke, Maeda Atsushi, Takeda Hiroki, Shizu Kanae, Suzuki Katsuji, Yamada Harumoto
Department of Orthopaedic Surgery, Fujita Health University, Aichi, Japan.
Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan.
JB JS Open Access. 2017 Mar 10;2(1):e0012. doi: 10.2106/JBJS.OA.16.00012. eCollection 2017 Mar 30.
This article was updated on May 4, 2017, because of a previous error. The proximal line drawn in Figure 1 was different from the line described in the Materials and Methods section, which reads "The proximal line was drawn at the level of the radial tuberosity, and the distal line was made at the level of the top of the radial bowing (Fig. 1)." The correct figure is presented in this version of the article. An erratum has been published: JBJS Open Access. 2017 May 26;2(2):e0012ER.
We conducted a retrospective cohort study to evaluate the normal value, range, reliability, and validity of measurement of the humerus-elbow-wrist angle, an index of valgus-varus angulation of the elbow, in healthy children. This measurement has been used to assess postoperative radiographic results.
Radiographs of the elbow in 62 healthy children ranging from 2 to 11 years of age were reviewed by 6 examiners at 2 sessions. The mean value and the reliability of measurement of the humerus-elbow-wrist angle, the carrying angle, and the Baumann angle were assessed. Intraobserver and interobserver reliability were calculated with use of intraclass correlation coefficients (ICCs). To determine concurrent validity, the association between the humerus-elbow-wrist angle and carrying angle measurements was examined with use of Pearson correlation coefficients.
The mean humerus-elbow-wrist angle value was 12.0° (range, 1° to 24°), and the mean carrying angle was 14.6° (range, 4° to 28°). The ICCs for intraobserver measurements of the humerus-elbow-wrist angle were almost perfect for 4 examiners and were substantial for 2 examiners, with a mean value of 0.85 (range, 0.73 to 0.94). The ICCs for interobserver reliability with regard to the first and second measurements of the humerus-elbow-wrist angle were both substantial (0.76 and 0.78). A significant association between the humerus-elbow-wrist angle and the carrying angle was observed, with the Pearson correlation coefficients ranging from 0.74 to 0.90 (p < 0.001).
Measurement of the humerus-elbow-wrist angle demonstrated good reliability and validity. The humerus-elbow-wrist angle is a reliable radiographic measure of coronal alignment of the humerus and forearm.
由于之前的错误，本文于2017年5月4日进行了更新。图1中绘制的近端线与材料与方法部分描述的线不同，材料与方法部分写道：“近端线在桡骨结节水平绘制，远端线在桡骨弯曲顶部水平绘制（图1）。”本文的此版本展示了正确的图。已发布勘误：《美国矫形外科医师学会杂志》开放获取版。2017年5月26日；2(2):e0012ER。
我们进行了一项回顾性队列研究，以评估健康儿童中肱骨 - 肘 - 腕角（一种肘部内翻 - 外翻成角指数）测量的正常值、范围、可靠性和有效性。该测量已用于评估术后影像学结果。
6名检查者分两个阶段对62名年龄在2至11岁的健康儿童的肘部X线片进行了复查。评估了肱骨 - 肘 - 腕角、提携角和鲍曼角测量的平均值及可靠性。使用组内相关系数（ICC）计算观察者内和观察者间的可靠性。为确定同时效度，使用Pearson相关系数检查肱骨 - 肘 - 腕角与提携角测量之间的关联。
肱骨 - 肘 - 腕角的平均值为12.0°（范围为1°至24°），提携角的平均值为14.6°（范围为4°至28°）。4名检查者对肱骨 - 肘 - 腕角的观察者内测量的ICC几乎为完美，2名检查者的ICC为高，平均值为0.85（范围为0.73至0.94）。肱骨 - 肘 - 腕角第一次和第二次测量的观察者间可靠性的ICC均为高（分别为0.76和0.78）。观察到肱骨 - 肘 - 腕角与提携角之间存在显著关联，Pearson相关系数范围为0.74至0.90（p < 0.001）。
肱骨 - 肘 - 腕角的测量显示出良好的可靠性和有效性。肱骨 - 肘 - 腕角是肱骨和前臂冠状位对线的可靠影像学测量指标。
