Department of Geriatrics and National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Sichuan Province, Chengdu, 610041, China.
BMC Geriatr. 2022 Jul 15;22(1):580. doi: 10.1186/s12877-022-03270-6.
The Jamar hydraulic dynamometer is a widely recognized tool for measuring grip strength. Nevertheless, the devices used most often in Asian countries are spring-type dynamometers, represented by the CAMRY dynamometer or Smedley dynamometer. We aimed to evaluate the reliability and validity of the CAMRY dynamometer compared with the Jamar dynamometer.
This was a cross-sectional study using a random crossover design in the grip strength test with two dynamometers. A total of 1064 healthy community-dwelling older adults aged 50-90 years old, which included 686 minorities and 378 Han Chinese, were recruited into the study from July to September 2021. We assessed the reliability and validity of the CAMRY EH101 dynamometer, and the Jamar dynamometer was regarded as the reference device. The order of testing with two dynamometers was randomized in a 1:1 ratio, with a 10-min gap between the two devices. Intraclass correlation coefficients (ICCs) and Bland-Altman analysis were calculated to assess reliability and validity between the two devices.
The average handgrip strength (HGS) values at six times by the Jamar and CAMRY devices were 25.0 ± 7.9 kg and 24.6 ± 7.5 kg, respectively. The ICC values between the two devices were 0.815-0.854, and the systematic bias underestimated by the CAMRY dynamometer was 0.5 kg in men and 0.6 kg in women. We carried out a linear regression equation by sex, and their relationship was found as follows: male HGS (kg) = 8.001 + 0.765 × HGS (kg); female HGS (kg) = 3.681 + 0.840 × HGS (kg).
The CAMRY EH101 dynamometer provides excellent reliability and validity. This device can serve as a reliable, inexpensive, and practical device to assess grip strength in geriatric clinical practice.
Chinese Clinical Trial Registry: ChiCTR2100046367 ; Date of clinical trial reistration: 15/05/2021.
Jamar 液压测力计是一种广泛认可的测量握力的工具。然而，在亚洲国家最常使用的设备是弹簧式测力计，以 Camry 测力计或 Smedley 测力计为代表。我们旨在评估 Camry 测力计与 Jamar 测力计相比的可靠性和有效性。
这是一项使用握力测试中两种测力计的随机交叉设计的横断面研究。共有 1064 名年龄在 50-90 岁的健康社区居住的老年人，包括 686 名少数民族和 378 名汉族人，于 2021 年 7 月至 9 月被招募入组。我们评估了 Camry EH101 测力计的可靠性和有效性，Jamar 测力计被视为参考设备。两种测力计的测试顺序以 1:1 的比例随机排列，两种设备之间间隔 10 分钟。计算了两种设备之间的组内相关系数（ICC）和 Bland-Altman 分析，以评估可靠性和有效性。
Jamar 和 Camry 设备六次测量的平均手握力（HGS）值分别为 25.0±7.9kg 和 24.6±7.5kg。两种设备之间的 ICC 值为 0.815-0.854，Camry 测力计低估的系统偏差在男性中为 0.5kg，在女性中为 0.6kg。我们按性别进行了线性回归方程，发现它们之间的关系如下：男性 HGS（kg）=8.001+0.765×HGS（kg）；女性 HGS（kg）=3.681+0.840×HGS（kg）。
Camry EH101 测力计具有出色的可靠性和有效性。该设备可作为评估老年临床实践中握力的可靠、廉价且实用的设备。
中国临床试验注册中心：ChiCTR2100046367；临床试验注册日期：2021 年 5 月 15 日。
