Department of Orthopaedic Surgery, Chungnam National University Sejong Hospital, Chungnam National University College of Medicine, Sejong, Korea.
Department of Biomedical Engineering, Chungnam National University, Sejong, Korea.
Clin Orthop Surg. 2024 Aug;16(4):610-619. doi: 10.4055/cios23383. Epub 2024 Jun 7.
Grip strength is important for fine motor skills, and one of the measurement tools for grip strength is the Martin Vigorimeter (MV) dynamometer. Studies on establishing the reliability and validity of the MV in Koreans are limited. We aimed to establish the reliability and validity of the MV for grip strength measurement in healthy Korean adults by comparing it with the Jamar dynamometer, the standard tool used by the American Society of Hand Therapists.
In total, 99 healthy participants (50 men and 49 women) were enrolled. Grip strength was measured using the Jamar dynamometer and MV. Reliability and validity were assessed using the intraclass correlation coefficient (ICC) and minimal detectable change (MDC). The correlation between the measurements of the instruments was analyzed using Pearson's correlation. The effect of hand anthropometry was evaluated, and the conversion equation between the instruments was calculated.
MV showed excellent reliability (ICC > 0.90, < 0.001) and validity with a high correlation (0.7 ≤ < 0.9) with the Jamar dynamometer. The MDC was acceptable for detecting minimal clinically important differences (< 19.5%) in both instruments (Jamar: 3.4%-6.7%, MV: 3.8% to 6.3%). The grip strength measured using the MV was independent of hand anthropometry, unlike that using the Jamar dynamometer.
This study provides insights into the relationship between the Jamar and MV instruments for measuring grip strength in Koreans. The MV is a viable alternative to the Jamar dynamometer in Koreans, offering not only reproducible and reliable measurements of grip strength but also the advantage of being unaffected by variations in hand anthropometry.
握力对于精细运动技能很重要，握力的测量工具之一是 Martin Vigorimeter（MV）测力计。关于 MV 在韩国人群中可靠性和有效性的研究有限。我们旨在通过与美国手治疗师协会（American Society of Hand Therapists）使用的标准工具 Jamar 测力计相比，来确定 MV 测量健康韩国成年人握力的可靠性和有效性。
共有 99 名健康参与者（50 名男性和 49 名女性）被纳入研究。使用 Jamar 测力计和 MV 测量握力。使用组内相关系数（ICC）和最小可检测变化量（MDC）评估可靠性和有效性。使用 Pearson 相关分析评估仪器测量值之间的相关性。评估手人类学的影响，并计算仪器之间的转换方程。
MV 与 Jamar 测力计具有高度相关性（0.7≤ < 0.9），显示出极好的可靠性（ICC>0.90， <0.001）。MDC 可接受，可检测两种仪器的最小临床重要差异（<19.5%）（Jamar：3.4%-6.7%，MV：3.8%至 6.3%）。与 Jamar 测力计不同，MV 测量的握力不受手人类学的影响。
本研究提供了关于 Jamar 和 MV 仪器在韩国人群中测量握力的关系的见解。MV 是 Jamar 测力计的一种可行替代方法，不仅提供可重复且可靠的握力测量，而且不受手人类学变化的影响。
