Department of Rehabilitation, Yamagata City Hospital Saiseikan, Yamagata, Japan.
Department of Orthopaedic Surgery, Bell Land General Hospital, Osaka, Japan.
J Hand Surg Asian Pac Vol. 2023 Oct;28(5):562-572. doi: 10.1142/S2424835523500601. Epub 2023 Oct 25.
Standardised measurement protocols for grip strength remained unclear due to variations in values depending on the device and measurement method. The load cell hand dynamometer has recently been developed. This study aims to investigate the reliability of the load cell dynamometer by comparing it to the Jamar dynamometer, which is considered the gold standard, and to identify a reliable and practical measurement method. This study included 80 healthy hospital workers (mean age of 40.1 years). All measurements were performed seated, with the elbow flexed 90° and the grip span at the second handle (approximately 50 mm) for the Jamar dynamometer, and with the elbow extended and the grip span fixed at 55 mm for the load cell dynamometer. Grip strength was measured three times on each hand using two dynamometers, and the same tests were repeated on different days. Test-retest reliability, the association between the two devices and the agreement between the two measurement methods were assessed using the intraclass correlation coefficient (ICC), Pearson correlation and the Bland-Altman analysis. The ICC of the one measurement was lower than that of three measurements for both dynamometers, but was above 0.858 in all groups, indicating sufficient reliability with one-time measurement. Additionally, the ICC for different days revealed good reliability (Jamar: >0.830, load cell: >0.772). The load cell dynamometer showed significantly lower values in all measurements despite the excellent correlation ( > 0.70) and the agreement between the two dynamometers. This study revealed sufficient reliability of the load cell dynamometer with the standardised measurement method, but it should be noted the lower values compared to the Jamar dynamometer. Additionally, one-time measurement reliability is adequate for practical use by standardising the measurement methods for both dynamometers. Level III (Diagnostic).
由于测量仪器和方法的不同，握力的标准化测量方案仍不明确。最近开发了一种负荷传感器握力计。本研究旨在通过比较负荷传感器握力计与被认为是金标准的 Jamar 握力计，来评估负荷传感器握力计的可靠性，并确定一种可靠且实用的测量方法。
该研究纳入了 80 名健康的医院工作人员（平均年龄 40.1 岁）。所有测量均在坐姿下进行，Jamar 握力计的测量时，肘部弯曲 90°，握持间距为第二个手柄（约 50mm）；而在使用负荷传感器握力计时，肘部伸展，握持间距固定为 55mm。双手使用两种握力计各测量 3 次，不同天重复进行相同的测试。采用组内相关系数（ICC）、Pearson 相关系数和 Bland-Altman 分析评估两种握力计间的测试-再测试可靠性、两种仪器间的相关性和两种测量方法间的一致性。
两种握力计的单次测量的 ICC 均低于三次测量的 ICC，但在所有组中均大于 0.858，表明单次测量具有足够的可靠性。此外，不同天的 ICC 也显示出良好的可靠性（Jamar：>0.830，负荷传感器：>0.772）。尽管两种握力计间具有极好的相关性（>0.70），一致性良好，但负荷传感器握力计在所有测量中均显示出较低的数值。
本研究表明，使用标准化测量方法时，负荷传感器握力计具有足够的可靠性，但应注意其与 Jamar 握力计相比数值较低。此外，通过标准化两种握力计的测量方法，单次测量的可靠性足以满足实际应用。
诊断准确性研究。
