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J Peripher Nerv Syst. 2015 Sep;20(3):269-76. doi: 10.1111/jns.12126.

Grip strength comparison in immune-mediated neuropathies: Vigorimeter vs. Jamar.

Author information

1
Department of Neurology, Maastricht University Medical Center, Maastricht, The Netherlands.
2
Department of Neurology, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands.
3
Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, The Netherlands.
4
Department of Neurology, St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA, USA.
5
Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Centre, Utrecht, The Netherlands.
6
Department of Neurology, Cedars-Sinai Medical Center, Los Angeles, California, USA.
7
Department of Neurological Sciences, Milan University, Humanitas Clinical Institute, Milan, Italy.
8
Department of Neurology, Hôpital de la Salpêtrière, Paris, France.
9
Neuromuscular Reference Centre UCL St-Luc, University Hospitals St-Luc, Brussels, Belgium.
10
Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Milan, Italy.
11
Department of Neurology, Toronto General Hospital, Toronto, Canada.
12
Department of Neurology, Centre for Neuromuscular Disease, National Hospital for Neurology and Neurosurgery, London, UK.
13
Department of Neurology, Centre de Référence des Maladies Neuromusculaires et de la SLA, Hôpital de La Timone, Marseille, France.
14
Department of Neurology, Academic Medical Center, Amsterdam, The Netherlands.
15
Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, USA.
16
Department of Neurology, London Health Science Center, London, Canada.
17
Department of Neurology, Spaarne Hospital, Hoofddorp, The Netherlands.

Abstract

The Jamar dynamometer and Vigorimeter have been used to assess grip strength in immune-mediated neuropathies, but have never been compared to each other. Therefore, we performed a comparison study between these two devices in patients with immune-mediated neuropathies. Grip strength data were collected in 102 cross-sectional stable and 163 longitudinal (new diagnoses or changing condition) patients with Guillain-Barré syndrome (GBS), chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), gammopathy-related polyneuropathy (MGUSP), and multifocal motor neuropathy (MMN). Stable patients were assessed twice (validity/reliability studies). Longitudinal patients were assessed 3-5 times during 1 year. Responsiveness comparison between the two tools was examined using combined anchor-/distribution-based minimum clinically important difference (MCID) techniques. Patients were asked to indicate their preference for the Jamar or Vigorimeter. Both tools correlated highly with each other (ρ = 0.86, p < 0.0001) and showed good intra-class correlation coefficients (Jamar [Right/Left hands]: ICC 0.997/0.96; Vigori: ICC 0.95/0.98). Meaningful changes were comparable between the two instruments, being higher in GBS compared to CIDP patients. In MGUSP/MMN poor responsiveness was seen. Significant more patients preferred the Vigorimeter. In conclusion, validity, reliability, and responsiveness aspects were comparable between the Jamar dynamometer and Vigorimeter. However, based on patients' preference, the Vigorimeter is recommended in future studies in immune-mediated neuropathies.

KEYWORDS:

Jamar dynamometer; Vigorimeter; grip strength; responsiveness comparison

PMID:
26115516
DOI:
10.1111/jns.12126
[Indexed for MEDLINE]

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