Assessing grip strength in healthy individuals and patients with immune-mediated polyneuropathies

I. S J Merkies, P. I M Schmitz, J. P A Samijn, F. G A Van Der Mech, K. V. Toyka, P. A. Van Doorn, J. Aubry, N. Baumann, [No Value] Bouche, G. Comi, M. C. Dalakas, H. P. Hartung, R. A C Hughes, I. Illa, M. R J Knapp, J. M. Lger, R. Nemni, E. Nobile-Orazio, K. V. Toyka, P. Van De BerghF. G A Van Der Mech, P. A. Van Doorn, H. J. Willison, B. Younes-Chennoufi

Research output: Contribution to journalArticle


Grip strength reference values for a portable dynamometer, the hand-held Vigorimeter, were calculated, and its validity, reliability, and responsiveness were examined in patients with immune-mediated polyneuropathies. We studied 530 healthy controls (age 5-93 years), 113 patients with stable polyneuropathy (83 with Guillain-Barre syndrome [GBS], 22 with chronic inflammatory demyelinating polyneuropathy [CIDP], and 8 with a gammopathy-associated polyneuropathy), and 20 patients with GBS or CIDP and changing clinical conditions (longitudinal group). An arm-disability scale was also assessed. Grip-strength reference values were calculated depending primarily on age and gender. Significant association was obtained between the Vigorimeter and the arm scale (in stable group, Spearman rank: r = -0.52 to -0.62; P ≤ 0.0005; in longitudinal group, linear regressions: r = 0.62-0.64, P <0.0001). Good interobserver and intraobserver agreements (analysis of variance, r = 0.95-0.97) and high responsiveness (standardized response mean scores ≥ 0.8) were demonstrated for the Vigorimeter. These results emphasize the clinical usefulness of the Vigorimeter, particularly in patients with immune-mediated polyneuropathies. (C) 2000 John Wiley and Sons, Inc.

Original languageEnglish
Pages (from-to)1393-1401
Number of pages9
JournalMuscle and Nerve
Issue number9
Publication statusPublished - 2000



  • Grip strength
  • Immune-mediated polyneuropathies
  • Reference values
  • Reliability
  • Responsiveness
  • Validity

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Cite this

Merkies, I. S. J., Schmitz, P. I. M., Samijn, J. P. A., Van Der Mech, F. G. A., Toyka, K. V., Van Doorn, P. A., Aubry, J., Baumann, N., Bouche, N. V., Comi, G., Dalakas, M. C., Hartung, H. P., Hughes, R. A. C., Illa, I., Knapp, M. R. J., Lger, J. M., Nemni, R., Nobile-Orazio, E., Toyka, K. V., ... Younes-Chennoufi, B. (2000). Assessing grip strength in healthy individuals and patients with immune-mediated polyneuropathies. Muscle and Nerve, 23(9), 1393-1401.<1393::AID-MUS10>3.0.CO;2-O