Turkish Adaptation Study of the Generic Functional Index
NCT ID: NCT07004478
Last Updated: 2026-01-06
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
200 participants
OBSERVATIONAL
2025-07-01
2026-06-01
Brief Summary
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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.
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Detailed Description
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This study aims to translate and culturally adapt the Generic Functional Index into Turkish and to investigate its psychometric properties in individuals with musculoskeletal disorders. The adaptation will follow an internationally recognized translation methodology, including forward translation, synthesis, back-translation, expert committee review, and pre-testing. Psychometric evaluation will involve data collection from individuals with musculoskeletal conditions, with analyses focusing on internal consistency, test-retest reliability, and construct validity.
Construct validity will be examined by analyzing the relationship between the Turkish Generic Functional Index and the Functional Independence Measure, which is a widely used tool for assessing independence in daily living activities. A strong correlation between these tools will support the convergent validity of the Turkish Generic Functional Index.
This study is significant because a valid and reliable Turkish version of the Generic Functional Index will provide clinicians and researchers with a standardized tool for evaluating functional limitations in Turkish-speaking populations with musculoskeletal disorders. It will also contribute to the international applicability of the Generic Functional Indexby expanding its use to different cultural and linguistic contexts.
Conditions
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Study Design
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OTHER
PROSPECTIVE
Study Groups
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Participants with musculoskeletal conditions
The sample will include adult individuals presenting with various musculoskeletal disorders, including but not limited to low back pain, osteoarthritis, tendinopathies, or other soft tissue conditions, which may influence their functional status.
Translating the Generic Functional Index into Turkish and Related Processes
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.
Validity
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.
Internal consistency and Reliability
The internal consistency of the items will be tested with Cronbach alpha. Test-retest reliability will be tested with intraclass correlation coefficient.
Interventions
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Translating the Generic Functional Index into Turkish and Related Processes
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.
Validity
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.
Internal consistency and Reliability
The internal consistency of the items will be tested with Cronbach alpha. Test-retest reliability will be tested with intraclass correlation coefficient.
Eligibility Criteria
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Inclusion Criteria
* Turkish literacy,
* Cognitive competence,
* Having a musculoskeletal disorder
Exclusion Criteria
* Those with cognitive impairment, or
* Those with a mental or physical condition that would prevent them from understanding the scale.
18 Years
65 Years
ALL
Yes
Sponsors
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Istanbul Bilgi University
OTHER
Responsible Party
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Furkan Çakır
Principal Investigator
Principal Investigators
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Elif Elcin Dereli, Prof.
Role: STUDY_DIRECTOR
Istanbul Bilgi University
Selina Kara, BSc.
Role: PRINCIPAL_INVESTIGATOR
Istanbul Bilgi University
Locations
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Istanbul Bilgi University
Istanbul, Beyoglu, Turkey (Türkiye)
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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IstanbulBUFC9
Identifier Type: -
Identifier Source: org_study_id
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