Translation, reliability, and validity of the trunk impairment scale in a Polish population after stroke

Authors

  • Joanna Małecka Department of Neuromuscular Physiotherapy, Poznan University of Physical Education, Poznan, Poland
  • Magdalena Goliwąs Department of Musculoskeletal Rehabilitation, Poznan University of Physical Education, Poznan, Poland
  • Katarzyna Adamczewska Department of Neuromuscular Physiotherapy, Poznan University of Physical Education, Poland
  • Jacek Lewandowski Department of Musculoskeletal Rehabilitation, Poznan University of Physical Education, Poznan, Poland
  • Geert Verheyden Department of Rehabilitation Sciences, KU Leuven – University of Leuven, Leuven, Belgium; Leuven Brain Institute, KU Leuven – University of Leuven, Leuven, Belgium
  • Dawid Łochyński Department of Neuromuscular Physiotherapy, Poznan University of Physical Education, Poznan, Poland

DOI:

https://doi.org/10.2340/jrm.v58.44789

Keywords:

stroke, outcome measure, TIS, FMA, ARAT, trunk impairment

Abstract

Objective: This study was conducted to estimate the reliability and validity of the translated and culturally adapted Polish version of the Trunk Impairment Scale in post-stroke patients and to determine the strength of the relationship between trunk and upper limb physical function after stroke.

Design: The Polish version of the Trunk Impairment Scale was developed through cultural adaptation. Internal consistency, test–retest reliability, and inter-rater reliability were determined, and construct validity was evaluated by analysing the Polish version of the Trunk Impairment Scale, the Polish version of the Fugl-Meyer Assessment Scale, and the Polish version of the Action Research Arm Test.

Participants: Eighty patients with diagnosed stroke in the subacute and chronic stages.

Results: The internal consistency for the Polish version of the Trunk Impairment Scale was excellent (α = 0.85–0.91). Test–retest and inter-rater reliability were almost perfect (ICC = 0.94–1.0, κ = 0.92–1.0). Construct validity was moderate (rho = 0.71–0.76). A moderate correlation was also found between the Polish version of the Trunk Impairment Scale and Polish version of the Action Research Arm Test total scores (rho = 0.60).

Conclusion: The Polish version of the Trunk Impairment Scale is a reliable and moderately valid outcome measure to assess trunk impairment in Polish stroke survivors. Trunk function is moderately related to gross and fine motor skills of the arm, hand, and fingers among individuals with stroke.

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Published

2026-03-10

How to Cite

Małecka, J., Goliwąs, M., Adamczewska, K., Lewandowski, J., Verheyden, G., & Łochyński, D. (2026). Translation, reliability, and validity of the trunk impairment scale in a Polish population after stroke. Journal of Rehabilitation Medicine, 58, jrm44789. https://doi.org/10.2340/jrm.v58.44789

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