| چکیده انگلیسی مقاله |
Objective: This study aimed to translate, culturally adapt, and psychometrically validate the Persian version of the Upper Limb Functional Index (ULFI) in Iranian patients with upper limb musculoskeletal disorders.
Methods: A cross-sectional study was conducted with 200 Iranian outpatients diagnosed with upper limb musculoskeletal disorders. Translation and cultural adaptation were conducted in accordance with Beaton et al.'s guidelines, including forward translation, back-translation, expert panel review, and pilot testing. Psychometric evaluation involved internal consistency (Cronbach's alpha), test-retest reliability (intraclass correlation coefficient [ICC]), construct validity (convergent validity with the Disabilities of the Arm, Shoulder, and Hand [DASH] questionnaire), confirmatory factor analysis (CFA), and responsiveness.
Results: The Persian ULFI exhibited excellent internal consistency (Cronbach's alpha = 0.91) and high test-retest reliability (intraclass correlation coefficient [ICC] = 0.88, 95% confidence interval [CI]: 0.82–0.93). Convergent validity was confirmed through a strong correlation with the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire (r = 0.76, P < 0.001). Confirmatory factor analysis (CFA) supported a unidimensional structure, with fit indices (comparative fit index [CFI] = 0.96, Tucker-Lewis Index [TLI] = 0.95, root mean square error of approximation [RMSEA] = 0.06, standardized root mean square residual [SRMR] = 0.04). Responsiveness analysis demonstrated significant improvement after rehabilitation (effect size = 0.89, standardized response mean [SRM] = 1.12, P < 0.001).
Conclusion: 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 impairment. |
| نویسندگان مقاله |
| Masoud Gharib
Mazandaran University of Medical Sciences, Sari, Iran.
| Mehran Razavipour
Mazandaran University of Medical Sciences, Sari, Iran.
| Prastoo Mohammad Amini
Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran.
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