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. 2025 May-Jun:63:422-427.
doi: 10.1016/j.gerinurse.2025.03.056. Epub 2025 Apr 18.

Reliability of the Wolf Motor Function Test for Parkinson's disease

Vera Lúcia Santos de Britto  1 , Tatiana Vasconcelos da Silva  2 , Cynthia do Carmo Gomes de Andrade  2 , Larissa de Freitas Domingos  2 , Renan Vicente da Silva  2 , Ana Elisa Lemos Silva  3 , Luiz Felipe Vasconcellos  4 , Ana Paula Fontana  5 , Clynton Lourenço Correa  6
Affiliations

Reliability of the Wolf Motor Function Test for Parkinson's disease

Vera Lúcia Santos de Britto et al. Geriatr Nurs. 2025 May-Jun.

Abstract

Background: Assessment of upper limbs in Parkinson's disease (PD) is mandatory to be considered in clinical practice and research. However, few clinical assessments for upper limbs in PD are available. The objective was to evaluate some measurement properties of the Wolf Motor Function Test (WMFT) in individuals with PD.

Methods: Cross-sectional. Intrarater, interrater and test-retest reliabilities were established by analyzing the results from video assessments of the WMFT in patients with PD (n = 50).

Results and discussion: Excellent intrarater reliability for execution time (intraclass correlation coefficient - ICC> 0.75) and substantial intrarater reliability (weighted Kappa - K = 0.61-0.80) for Functional Ability Scale (FAS) for most WMFT tasks were observed. Test-retest was moderate for execution time (ICC ≤ 0.75). Both tasks 7 and 14 had excellent test-retest reliability (ICC = 0.99). The interrater reliability was considerable for performance, for most WMFT tasks, for FAS (K = 0.21-0.40).

Conclusions: WMFT showed intrarater and interrater reliabilities to assess the UL in patients with PD.

Keywords: Disability evaluation; Parkinson disease; Reproducibility of results; Upper extremity; Validation study.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.