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Wed, Jul 2, 2025
Accepted article
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1- Orthopedic research center
2- Student research committee, Mazandaran University of Medical Sciences, Sari, Iran.
2- Student research committee, Mazandaran University of Medical Sciences, Sari, Iran.
Abstract: (11 Views)
Objective: This study aimed to translate, culturally adapt, and psychometrically validate the Persian ULFI among Iranian patients with upper limb musculoskeletal disorders.
Methods: A cross-sectional study was conducted with 200 Iranian outpatients diagnosed with upper limb musculoskeletal disorders. The translation and cultural adaptation followed Beaton et al.'s guidelines, including forward translation, back-translation, expert panel review, and pilot testing. The psychometric evaluation involved internal consistency (Cronbach’s α), test-retest reliability (Intraclass Correlation Coefficient, ICC), construct validity (convergent validity with the DASH questionnaire), confirmatory factor analysis (CFA), and responsiveness.
Results: The Persian ULFI exhibited excellent internal consistency (Cronbach’s α = 0.91) and high test-retest reliability (ICC = 0.88, 95% CI: 0.82–0.93). Convergent validity was confirmed through a strong correlation with the DASH questionnaire (r = 0.76, p < 0.001). CFA supported a unidimensional structure, with fit indices (CFI = 0.96, TLI = 0.95, RMSEA = 0.06, SRMR = 0.04). The responsiveness analysis demonstrated significant improvement after rehabilitation (effect size = 0.89, SRM = 1.12, p < 0.001).
Discussion: The Persian ULFI is a valid, reliable, and responsive tool for assessing upper limb function in Iranian patients. It can be effectively used in clinical settings and research to evaluate rehabilitation outcomes and functional impairments.
Methods: A cross-sectional study was conducted with 200 Iranian outpatients diagnosed with upper limb musculoskeletal disorders. The translation and cultural adaptation followed Beaton et al.'s guidelines, including forward translation, back-translation, expert panel review, and pilot testing. The psychometric evaluation involved internal consistency (Cronbach’s α), test-retest reliability (Intraclass Correlation Coefficient, ICC), construct validity (convergent validity with the DASH questionnaire), confirmatory factor analysis (CFA), and responsiveness.
Results: The Persian ULFI exhibited excellent internal consistency (Cronbach’s α = 0.91) and high test-retest reliability (ICC = 0.88, 95% CI: 0.82–0.93). Convergent validity was confirmed through a strong correlation with the DASH questionnaire (r = 0.76, p < 0.001). CFA supported a unidimensional structure, with fit indices (CFI = 0.96, TLI = 0.95, RMSEA = 0.06, SRMR = 0.04). The responsiveness analysis demonstrated significant improvement after rehabilitation (effect size = 0.89, SRM = 1.12, p < 0.001).
Discussion: The Persian ULFI is a valid, reliable, and responsive tool for assessing upper limb function in Iranian patients. It can be effectively used in clinical settings and research to evaluate rehabilitation outcomes and functional impairments.
Article type: Original Research Articles |
Subject:
Occupational therapy
Received: 2025/05/23 | Accepted: 2025/05/26
Received: 2025/05/23 | Accepted: 2025/05/26
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