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The Vocal Fold Dysfunction Questionnaire: Validity and Reliability of the Persian Version
Hamide Ghaemi1, Seyyedeh Maryam Khoddami1, Zahra Soleymani1
1Department of Speech Therapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Journal of Voice : Official Journal of the Voice Foundation
|December 30, 2017
Summary
The Persian Vocal Cord Dysfunction Questionnaire (VCDQp) is a valid and reliable tool for assessing vocal cord dysfunction in Persian speakers. This study confirmed its accuracy and consistency for clinical use.
Area of Science:
- Laryngology and Speech Pathology
- Psychometrics and Health Outcomes Measurement
Background:
- Vocal Cord Dysfunction (VCD) is a condition affecting voice quality and breathing.
- A validated Persian version of the Vocal Cord Dysfunction Questionnaire (VCDQ) is needed for clinical assessment in Persian-speaking populations.
Purpose of the Study:
- To develop, validate, and assess the reliability of the Persian version of the Vocal Cord Dysfunction Questionnaire (VCDQp).
Main Methods:
- Cross-sectional study involving 44 patients with VFD and 40 healthy volunteers.
- Content, face, concurrent (using COPD Assessment Test), discriminant, and treatment outcome validity were assessed.
- Internal consistency and test-retest reliability were evaluated.
Main Results:
- The Persian VCDQ demonstrated good internal consistency (Cronbach α = 0.78) and excellent test-retest reliability (ICC = 0.97).
- The questionnaire showed significant correlations with the Persian COPD Assessment Test and effectively discriminated between patients and healthy individuals.
- VCDQp scores significantly differed before and after treatment, indicating its utility as an outcome measure.
Conclusions:
- The Persian VCDQp is a valid, reliable, and culturally adapted self-administered questionnaire.
- It is suitable for use in Persian-speaking populations for diagnosing VCD and monitoring treatment outcomes.
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