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Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma

BACKGROUND: The aim of this study was to assess the validity and reliability of Nijmegen questionnaire (NQ) translated to Farsi for diagnosis of the hyperventilation syndrome (HVS) in patients with asthma. MATERIALS AND METHODS: The original version of NQ was translated to Farsi and then back-transl...

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Autores principales: Ravanbakhsh, Majid, Nargesi, Moslem, Raji, Hanieh, Haddadzadeh Shoushtari, Maryam
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Research Institute of Tuberculosis and Lung Disease 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4629426/
https://www.ncbi.nlm.nih.gov/pubmed/26528366
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author Ravanbakhsh, Majid
Nargesi, Moslem
Raji, Hanieh
Haddadzadeh Shoushtari, Maryam
author_facet Ravanbakhsh, Majid
Nargesi, Moslem
Raji, Hanieh
Haddadzadeh Shoushtari, Maryam
author_sort Ravanbakhsh, Majid
collection PubMed
description BACKGROUND: The aim of this study was to assess the validity and reliability of Nijmegen questionnaire (NQ) translated to Farsi for diagnosis of the hyperventilation syndrome (HVS) in patients with asthma. MATERIALS AND METHODS: The original version of NQ was translated to Farsi and then back-translated to English again to assess its agreement with the original version. To determine its cultural adaptation, a pilot study was carried out. The mean score of the questionnaire and the mean pressure of end tidal carbon dioxide (PETCO(2)) were compared in 100 asthmatic patients to determine the validity of the questionnaire. For reliability, 52 out of 100 patients randomly filled out the questionnaire with an interval of 5 to 10 days. Internal consistency and content validity of the questionnaire were assessed by Cronbach’s alpha coefficient and by calculating floor and ceiling effects respectively. The exploratory factor analysis was used to assess the factor structure. RESULTS: There was a significant inverse correlation between NQ scores and PETCO(2) (P=−0.783). Cronbach’s alpha coefficient was greater than 0.7, indicating good internal consistency of the questionnaire (P=0.702). The questionnaire had a good stability in an interval of 5 to 10 days (P=0.826). The NQ had no floor and ceiling effect. and also factor analysis of 16 scales showed that this questionnaire has a five-factor structure, which can describe 55% of data variance. CONCLUSION: The Iranian version of the Nijmegen questionnaire is a valid and reliable tool for detection of patients with HVS. In addition, the questionnaire can be used to evaluate the condition of respiratory function in people with asthma.
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spelling pubmed-46294262015-11-02 Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma Ravanbakhsh, Majid Nargesi, Moslem Raji, Hanieh Haddadzadeh Shoushtari, Maryam Tanaffos Original Article BACKGROUND: The aim of this study was to assess the validity and reliability of Nijmegen questionnaire (NQ) translated to Farsi for diagnosis of the hyperventilation syndrome (HVS) in patients with asthma. MATERIALS AND METHODS: The original version of NQ was translated to Farsi and then back-translated to English again to assess its agreement with the original version. To determine its cultural adaptation, a pilot study was carried out. The mean score of the questionnaire and the mean pressure of end tidal carbon dioxide (PETCO(2)) were compared in 100 asthmatic patients to determine the validity of the questionnaire. For reliability, 52 out of 100 patients randomly filled out the questionnaire with an interval of 5 to 10 days. Internal consistency and content validity of the questionnaire were assessed by Cronbach’s alpha coefficient and by calculating floor and ceiling effects respectively. The exploratory factor analysis was used to assess the factor structure. RESULTS: There was a significant inverse correlation between NQ scores and PETCO(2) (P=−0.783). Cronbach’s alpha coefficient was greater than 0.7, indicating good internal consistency of the questionnaire (P=0.702). The questionnaire had a good stability in an interval of 5 to 10 days (P=0.826). The NQ had no floor and ceiling effect. and also factor analysis of 16 scales showed that this questionnaire has a five-factor structure, which can describe 55% of data variance. CONCLUSION: The Iranian version of the Nijmegen questionnaire is a valid and reliable tool for detection of patients with HVS. In addition, the questionnaire can be used to evaluate the condition of respiratory function in people with asthma. National Research Institute of Tuberculosis and Lung Disease 2015 /pmc/articles/PMC4629426/ /pubmed/26528366 Text en Copyright© 2015 National Research Institute of Tuberculosis and Lung Disease This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
spellingShingle Original Article
Ravanbakhsh, Majid
Nargesi, Moslem
Raji, Hanieh
Haddadzadeh Shoushtari, Maryam
Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma
title Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma
title_full Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma
title_fullStr Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma
title_full_unstemmed Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma
title_short Reliability and Validity of the Iranian Version of Nijmegen Questionnaire in Iranians with Asthma
title_sort reliability and validity of the iranian version of nijmegen questionnaire in iranians with asthma
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4629426/
https://www.ncbi.nlm.nih.gov/pubmed/26528366
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