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Comparison of hand dynamometers in elderly people

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The journal of nutrition, health & aging

Abstract

Objective

Some dynamometers previously tested in healthy adults showed variable degrees of practicality, weight and ergonomics. More practical models could also be used as a more suitable tool in gerontological field and clinical studies. The purpose of the present study was to evaluate the reliability of the measurements and the performance of hand grip strength dynamometers in the elderly.

Study design

Crosssectional study.

Setting

A retirement home and a social day care centre for old people in Porto, Portugal.

Participants and measurements

The accuracy of four static grip strength dynamometers (Smedlay’s® Hand, Sammons Preston Rolyan® Bulb, Eisenhut® and the Jamar® Hydraulic Hand) was first tested in laboratory. The grip strength of fifty-five elderly individuals 65–99 years was measured with the four dynamometers and the Jamar® Hydraulic Hand which was used as the comparison dynamometer.

Results

The accuracy of the four dynamometers measurements compared to known forces was excellent (r > 0.96). A strong association between the measurements obtained by the Jamar® Hydraulic and the other instruments evaluated was found (r > 0.77) but significant differences between the mean hand grip strength values evaluated with the Jamar® Hydraulic and each one of the other dynamometers were found. The Bland and Altman plots confirmed that none of the three dynamometers reflects a good agreement with the Jamar® Hydraulic.

Conclusion

All four dynamometers showed excellent results regarding their laboratory tested accuracy. However, their application among elderly people rendered very different results. The Smedlay’s® results’ were closer to the Jamar® Hydraulic, though none of these three dynamometers produced comparable results to the Jamar® Hydraulic.

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Authors and Affiliations

  1. Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto, Porto, Portugal

    R. S. Guerra & Teresa F. Amaral

  2. UISPA, Unidade de Integração de Sistemas e Processos Automatizados do Instituto de Engenharia Mecanica da Universidade do Porto, Porto, Portugal

    Teresa F. Amaral

  3. Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto. Rua Dr. Roberto Frias, 4200 465, Porto, Portugal

    Teresa F. Amaral

Authors
  1. R. S. Guerra
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  2. Teresa F. Amaral
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Correspondence to Teresa F. Amaral.

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Guerra, R.S., Amaral, T.F. Comparison of hand dynamometers in elderly people. J Nutr Health Aging 13, 907–912 (2009). https://doi.org/10.1007/s12603-009-0250-3

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  • DOI: https://doi.org/10.1007/s12603-009-0250-3

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