Department of Physical Therapy, University of Delaware, Newark, DE.
Rangos School of Health Sciences, Duquesne University, Pittsburgh, PA.
Arch Phys Med Rehabil. 2020 Feb;101(2):275-282. doi: 10.1016/j.apmr.2019.07.008. Epub 2019 Aug 26.
To assess the convergent validity and reliability of joint angle measurements from a new video goniometer iPhone/iPad application separately in adults, older and young children.
Cross-sectional.
Child care and university environments.
Fifty-four adults (mean ± SD=22.5±4.5y), 20 older children (mean ± SD=10.9±2.2y), 20 younger children (mean ± SD=1.6±0.8y) (N=94).
Adults and older children performed both standardized static positions and functional activities. Younger children performed only a functional activity protocol.
Joint angle measurements using the app were validated against a commercially validated two-dimensional goniometric software program. In addition, validity of the app was compared to a standard mechanical goniometer for the measurement of angles drawn on a white board. Intra- and interrater reliability were assessed through independent rescoring of videos.
Correlations between joint angle estimates obtained from the app and goniometer software or a mechanical goniometer were positive and very strong (r>.900; P<.0001). The intraclass correlation coefficient (ICC) for repeated scoring from the app indicated excellent intra- and interrater reliability (ICC>.900).
High correlations for repeated measures and comparison to gold standard angle measurement instruments suggest that the new app is a valid and reliable tool for assessing joint angles during functional activity. This tool may provide clinicians an inexpensive yet accurate method for quantification of movements and immediate feedback on range of motion during tasks in a natural environment.
评估新的视频测角计 iPhone/iPad 应用程序在成人、大龄儿童和幼儿中分别测量关节角度的收敛效度和信度。
横断面研究。
儿童保育和大学环境。
54 名成年人（平均值±标准差=22.5±4.5 岁）、20 名大龄儿童（平均值±标准差=10.9±2.2 岁）、20 名小龄儿童（平均值±标准差=1.6±0.8 岁）（N=94）。
成年人和大龄儿童均进行了标准化静态姿势和功能性活动。小龄儿童仅进行了功能性活动方案。
使用该应用程序测量的关节角度与商业验证的二维测角软件程序进行了验证。此外，还将该应用程序的有效性与在白板上绘制角度的标准机械测角计进行了比较。通过独立重新评分视频来评估内部和组内可靠性。
从应用程序获得的关节角度估计值与测角计软件或机械测角计之间的相关性为正且非常强（r>.900；P<.0001）。应用程序的重复评分的组内相关系数（ICC）表明具有极好的组内和组间可靠性（ICC>.900）。
重复测量的高相关性以及与黄金标准角度测量仪器的比较表明，新应用程序是一种用于评估功能性活动期间关节角度的有效且可靠的工具。该工具可能为临床医生提供一种经济实惠且准确的方法，用于量化自然环境中任务中的运动，并在任务期间提供即时的运动范围反馈。
