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

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. (c) 2025 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.