Mitsukane Masahiro, Aoki Akino, Kakehi Tomohiro, Kobayashi Ryu, Kimura Naotoshi
Department of Occupational Therapy School of Health Sciences at Narita, International University of Health and Welfare, Narita City, Chiba, Japan.
Department of Physical Therapy, School of Health Sciences at Narita, International University of Health and Welfare, Narita City, Chiba, Japan.
J Hand Surg Glob Online. 2025 Feb 22;7(3):100704. doi: 10.1016/j.jhsg.2025.01.013. eCollection 2025 May.
To evaluate the reproducibility and the accuracy of our technique to measure the range of dart-throwing motion.
Two raters measured the range of dart-throwing motion of 42 healthy participants. The participants performed a simulated hammering action with a wooden mallet, and the inclination angle of the mallet on the vertical plane was measured using an attached bubble inclinometer at the maximal position of radial extension and ulnar flexion. The sum of these angles was defined as the range of the dart-throwing motion. Each rater performed three measurement trials for each participant. To determine inter-rater reproducibility, intra-class correlation coefficients were calculated for the value of one trial, mean value of two trials, and mean value of three trials. In the first test session, wrist kinematics during measurement was recorded simultaneously using a three-dimensional optical motion capture system.
Intra-class correlation coefficients for the dominant and nondominant sides ranged from 0.67 to 0.75 and 0.68 to 0.79, respectively. The reproducibility of the measurements was improved by adopting the mean value as the number of repetitions of the measurements increased. Bland-Altman analysis revealed that our measurement contained a proportional bias of 30.7% to 35.9% compared with the values of the motion capture analysis as the gold standard.
The reproducibility of the measurements was either good or moderate. The revealed biases can provide valuable data for estimating the true range of wrist motion.
Our technique would be useful for reliable measurement of the range of dart-throwing motion, as it is easy to perform repeated measurements. Our method avoids observer bias even by a single examiner and can be carried out with readily available materials.
评估我们测量飞镖投掷动作范围技术的可重复性和准确性。
两名评估者测量了42名健康参与者的飞镖投掷动作范围。参与者用木槌进行模拟锤击动作，并在桡侧伸展和尺侧屈曲的最大位置使用附着的气泡倾斜仪测量木槌在垂直平面上的倾斜角度。这些角度的总和被定义为飞镖投掷动作的范围。每位评估者对每位参与者进行三次测量试验。为了确定评估者间的可重复性，计算了一次试验值、两次试验平均值和三次试验平均值的组内相关系数。在第一次测试 session 中，使用三维光学运动捕捉系统同时记录测量过程中的手腕运动学数据。
优势侧和非优势侧的组内相关系数分别在0.67至0.75和0.68至0.79之间。随着测量重复次数增加采用平均值，测量的可重复性得到提高。Bland-Altman分析显示，与作为金标准的运动捕捉分析值相比，我们的测量存在30.7%至35.9%的比例偏差。
测量的可重复性良好或中等。所揭示的偏差可为估计手腕运动的真实范围提供有价值的数据。
我们的技术对于可靠测量飞镖投掷动作范围将是有用的，因为它易于进行重复测量。我们的方法即使由单一检查者进行也能避免观察者偏差，并且可以使用现成的材料进行。
