Carmona-Pérez Cristina, Pérez-Ruiz Alberto, Garrido-Castro Juan L, Vidal Francisco Torres, Alcaraz-Clariana Sandra, García-Luque Lourdes, Rodrigues-de-Souza Daiana Priscila, Alburquerque-Sendín Francisco
Centro de Recuperación Neurológica de Córdoba (CEDANE), 14005 Córdoba, Spain.
Doctoral Program in Biomedicine, University of Córdoba, 14004 Córdoba, Spain.
Diagnostics (Basel). 2020 Sep 1;10(9):661. doi: 10.3390/diagnostics10090661.
The aim of this study was to design and propose a new test based on inertial measurement unit (IMU) technology, for measuring cervical posture and motor control in children with cerebral palsy (CP) and to evaluate its validity and reliability.
Twenty-four individuals with CP (4-14 years) and 24 gender- and age-matched controls were evaluated with a new test based on IMU technology to identify and measure any movement in the three spatial planes while the individual is seated watching a two-minute video. An ellipse was obtained encompassing 95% of the flexion/extension and rotation movements in the sagittal and transversal planes. The protocol was repeated on two occasions separated by 3 to 5 days. Construct and concurrent validity were assessed by determining the discriminant capacity of the new test and by identifying associations between functional measures and the new test outcomes. Relative reliability was determined using the intraclass correlation coefficient (ICC) for test-retest data. Absolute reliability was obtained by the standard error of measurement (SEM) and the Minimum Detectable Change at a 90% confidence level (MDC).
The discriminant capacity of the area and both dimensions of the new test was high (Area Under the Curve ≈ 0.8), and consistent multiple regression models were identified to explain functional measures with new test results and sociodemographic data. A consistent trend of ICCs higher than 0.8 was identified for CP individuals. Finally, the SEM can be considered low in both groups, although the high variability among individuals determined some high MDC values, mainly in the CP group.
The new test, based on IMU data, is valid and reliable for evaluating posture and motor control in children with CP.
本研究旨在设计并提出一种基于惯性测量单元（IMU）技术的新测试方法，用于测量脑瘫（CP）儿童的颈椎姿势和运动控制，并评估其有效性和可靠性。
对24名患有CP的个体（4至14岁）和24名性别及年龄匹配的对照组进行基于IMU技术的新测试评估，以识别和测量个体在观看两分钟视频时三个空间平面内的任何运动。获得一个椭圆，其包含矢状面和横断面内95%的屈伸和旋转运动。该方案在间隔3至5天的两个时间段重复进行。通过确定新测试的判别能力以及识别功能测量与新测试结果之间的关联来评估结构效度和同时效度。使用组内相关系数（ICC）对重测数据确定相对可靠性。通过测量标准误（SEM）和90%置信水平下的最小可检测变化（MDC）获得绝对可靠性。
新测试的面积和两个维度的判别能力都很高（曲线下面积≈0.8），并且确定了一致的多元回归模型，用新测试结果和社会人口统计学数据来解释功能测量。对于患有CP的个体，确定了ICC高于0.8的一致趋势。最后，两组的SEM都可认为较低，尽管个体间的高变异性导致一些高的MDC值，主要在CP组。
基于IMU数据的新测试对于评估CP儿童的姿势和运动控制是有效且可靠的。
