Validity, reliability and responsiveness of the Brazilian version of the Patient Specific Functional Scale (PSFS-Br) in upper limb lesions
DOI:
https://doi.org/10.11606/issn.2317-0190.v26i2a164107Keywords:
Upper Extremity, Patient Health Questionnaire, Validation StudiesAbstract
Injuries can lead to functional consequences and changes in the lives of individuals. In addition to physical examination, a self-report questionnaire application is critical for decision making, prognosis determination, and treatment evaluation. The Patient Specific Functional Scale (PSFS) is an individual questionnaire that evaluates the individuals functional status and its advantages, which can be applied, ease of administration and responsive. However, this scale is not yet available in the Portuguese-Brazilian version. Objective: To perform a translation and cross-cultural adaptation of the questionnaire and to analyze its validity,reliability and responsiveness in patients with upper limb injuries. Methods: PSFS-Br was developed using standardized guidelines and the translation process took place in 5 steps. After a definitive version, 100 patients with upper limb injuries were recruited and answered by PSFS-Br, Quick-DASH-Br and Visual Analogue Scale on three occasions. Results: Proper understanding of the instrument by the target population resulted in good face validity. PSFS-Br, when compared to QuickDASH-Br, shows poor construct validity r = -0.36, excellent retest test reliability (ICC = 0.91) and high responsiveness with Effect Size (ES) = 1.85, Standand response mean (SRM) = 2.75, Standard Error of Measure (SEM) = 0.36 and Minimal Chande Diference (MCD) = 1.5. Conclusion: PSFS-Br is a valid, reliable and responsible tool for Brazilian patients with upper limb injuries.
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