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Turkish Adaptation Study of the Generic Functional Index

NCT07004478 · Status: RECRUITING · Type: OBSERVATIONAL · Enrollment: 200

Last updated 2026-01-06

No results posted yet for this study

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.

Conditions

  • Musculoskeletal Diseases

Interventions

OTHER

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.

OTHER

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.

OTHER

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.

Sponsors & Collaborators

  • Istanbul Bilgi University

    lead OTHER

Principal Investigators

  • Elif Elcin Dereli, Prof. · Istanbul Bilgi University

  • Selina Kara, BSc. · Istanbul Bilgi University

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-07-01
Primary Completion
2026-05-01
Completion
2026-06-01

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07004478 on ClinicalTrials.gov