Turkish Validation of the Nijmegen Questionnaire in COPD
Saglik Bilimleri Universitesi
90 participants
Apr 13, 2026
OBSERVATIONAL
Conditions
Summary
Dysfunctional breathing is a common and clinically relevant problem in patients with chronic obstructive pulmonary disease (COPD), contributing to increased dyspnea perception, reduced exercise tolerance, and impaired quality of life. The Nijmegen Questionnaire (NQ) is a widely used symptom-based instrument for screening dysfunctional breathing; however, a validated Turkish version for patients with COPD is currently unavailable. This observational methodological study aims to translate, culturally adapt, and evaluate the validity and reliability of the Turkish version of the Nijmegen Questionnaire (NQ-TR) in individuals with stable COPD.
Eligibility
Inclusion Criteria5
- Adults aged 18 years and older
- Diagnosis of COPD confirmed according to GOLD criteria
- Clinically stable disease (no acute exacerbation or hospitalization within the last 4 weeks)
- Ability to read and understand Turkish
- Willingness to participate and provide written informed consent
Exclusion Criteria7
- Acute COPD exacerbation or respiratory infection within the previous 4 weeks
- Presence of severe cardiac, neurological, or systemic disease affecting questionnaire responses
- Coexisting pulmonary conditions such as bronchiectasis, lung cancer, prior pulmonary tuberculosis, pleural disease, or history of lung surgery
- Moderate to severe cognitive impairment or communication difficulties
- Severe visual or hearing impairment preventing questionnaire completion
- Pregnancy
- Refusal to participate or withdrawal during the study
Interested in this trial?
Get notified about updates and connect with the research team.
Interventions
Administration of validated self-reported questionnaires (Nijmegen Questionnaire, CAT, mMRC, HADS, Dyspnea-12)
Locations(1)
View Full Details on ClinicalTrials.gov
For the most up-to-date information, visit the official listing.
NCT07344649