Turkish Adaptation Study of the Generic Functional Index
Turkish Adaptation, Validity and Reliability Study of the Generic Functional Index
Istanbul Bilgi University
200 participants
Jul 1, 2025
OBSERVATIONAL
Conditions
Summary
The Generic Functional Index is a scale developed to assess the general functional status of individuals. This study aims to evaluate the validity and reliability of the Turkish version of the Generic Functional Index. The adaptation process was designed to follow a standardized translation protocol, including forward translation, expert committee review, back-translation, pilot testing, and psychometric analyses. Data will be collected from individuals with musculoskeletal problems. Psychometric testing will include test-retest reliability, internal consistency, and construct validity analyses. The main hypotheses of this study are as follows: 1. The Turkish version of the Generic Functional Index will demonstrate high test-retest reliability when administered to individuals with musculoskeletal disorders. 2. The scores of the Turkish version of the Generic Functional Index will show a significant positive correlation with the scores of the Functional Independence Measure in individuals with musculoskeletal disorders.
Eligibility
Inclusion Criteria4
- Being 18 years of age or older,
- Turkish literacy,
- Cognitive competence,
- Having a musculoskeletal disorder
Exclusion Criteria3
- Those with acute functional impairment
- Those with cognitive impairment, or
- Those with a mental or physical condition that would prevent them from understanding the scale.
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Interventions
The translation process will follow a specific protocol in accordance with the guidelines. It will include two independent forward translations and one back-translation, conducted after obtaining written permission from the original authors. Discrepancies between translations will be reviewed by an expert committee to resolve terminological and cultural differences. The process will ensure conceptual and cultural equivalence between the original English version and the Turkish version. The final version of the questionnaire will be adapted to the target population and finalized in consultation with the original authors.
Content validity will be calculated with the Content Validity Index, which is a result of expert opinions in terms of clarity, difficulty, and suitability of the Turkish version of the Generic Functional Index.
The internal consistency of the items will be tested with Cronbach alpha. Test-retest reliability will be tested with intraclass correlation coefficient.
Locations(1)
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NCT07004478