Validation of the Reflux Disease Questionnaire into Greek
Primary care physicians face challenges in diagnosing and managing gastroesophageal reflux disease (GERD). The Reflux Disease Questionnaire (RDQ) meets the standards of validity, reliability, and practicability. This paper reports on the validation of the Greek translation of the RDQ. RDQ is a condi...
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2012-09-01
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doaj-0824ce0417ec4964bcc0a78d584193312021-05-02T19:47:12ZengMDPI AGGastroenterology Insights2036-74142036-74222012-09-0142e20e2010.4081/gi.2012.e202276Validation of the Reflux Disease Questionnaire into GreekEirini Oikonomidou0Constantinos Mihas1Foteini Anastasiou2Christos Lionis3Rural Setting Sindos, Health Centre Diabata; Clinic of Social and Family Medicine, School of Medicine, University of CreteGeneral Hospital-Health Centre of KimiClinic of Social and Family Medicine, School of Medicine, University of Crete; Rural Setting Pyrgos, Health Centre CharakaClinic of Social and Family Medicine, School of Medicine, University of CretePrimary care physicians face challenges in diagnosing and managing gastroesophageal reflux disease (GERD). The Reflux Disease Questionnaire (RDQ) meets the standards of validity, reliability, and practicability. This paper reports on the validation of the Greek translation of the RDQ. RDQ is a condition specific instrument. For the validation of the questionnaire, the internal consistency of its items was established using the alpha coefficient of Chronbach. The reproducibility (test-retest reliability) was measured by kappa correlation coefficient and the criterion of validity was calculated against the diagnosis of another questionnaire already translated and validated into Greek (IDGP) using kappa correlation coefficient. A factor analysis was also performed. Greek RDQ showed a high overall internal consistency (alpha value: 0.91) for individual comparison. All 8 items regarding heartburn and regurgitation, GERD, had <em>good</em> reproducibility (Cohen’s κ 0.60-0.79), while the remaining 4 items about dyspepsia had a <em>moderate</em> reproducibility (Cohen’s κ=’ 0.40-0.59) The kappa coefficient for criterion validity for GERD was rather poor (0.20, 95% CI: 0.04, 0.36) and the overall agreement between the results of the RDQ questionnaire and those based on the IDGP questionnaire was 70.5%. Factor analysis indicated 3 factors with Eigenvalue over 1.0, and responsible for 76.91% of variance. Regurgitation items correlated more strongly with the third component but pain behind sternum and upper stomach pain correlated with the second component. The Greek version of RDQ seems to be a reliable and valid instrument following the pattern of the original questionnaire, and could be used in primary care research in Greece.http://www.pagepress.org/journals/index.php/gi/article/view/4153gastroesophageal reflux disease, questionnaire, Greece |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eirini Oikonomidou Constantinos Mihas Foteini Anastasiou Christos Lionis |
spellingShingle |
Eirini Oikonomidou Constantinos Mihas Foteini Anastasiou Christos Lionis Validation of the Reflux Disease Questionnaire into Greek Gastroenterology Insights gastroesophageal reflux disease, questionnaire, Greece |
author_facet |
Eirini Oikonomidou Constantinos Mihas Foteini Anastasiou Christos Lionis |
author_sort |
Eirini Oikonomidou |
title |
Validation of the Reflux Disease Questionnaire into Greek |
title_short |
Validation of the Reflux Disease Questionnaire into Greek |
title_full |
Validation of the Reflux Disease Questionnaire into Greek |
title_fullStr |
Validation of the Reflux Disease Questionnaire into Greek |
title_full_unstemmed |
Validation of the Reflux Disease Questionnaire into Greek |
title_sort |
validation of the reflux disease questionnaire into greek |
publisher |
MDPI AG |
series |
Gastroenterology Insights |
issn |
2036-7414 2036-7422 |
publishDate |
2012-09-01 |
description |
Primary care physicians face challenges in diagnosing and managing gastroesophageal reflux disease (GERD). The Reflux Disease Questionnaire (RDQ) meets the standards of validity, reliability, and practicability. This paper reports on the validation of the Greek translation of the RDQ. RDQ is a condition specific instrument. For the validation of the questionnaire, the internal consistency of its items was established using the alpha coefficient of Chronbach. The reproducibility (test-retest reliability) was measured by kappa correlation coefficient and the criterion of validity was calculated against the diagnosis of another questionnaire already translated and validated into Greek (IDGP) using kappa correlation coefficient. A factor analysis was also performed. Greek RDQ showed a high overall internal consistency (alpha value: 0.91) for individual comparison. All 8 items regarding heartburn and regurgitation, GERD, had <em>good</em> reproducibility (Cohen’s κ 0.60-0.79), while the remaining 4 items about dyspepsia had a <em>moderate</em> reproducibility (Cohen’s κ=’ 0.40-0.59) The kappa coefficient for criterion validity for GERD was rather poor (0.20, 95% CI: 0.04, 0.36) and the overall agreement between the results of the RDQ questionnaire and those based on the IDGP questionnaire was 70.5%. Factor analysis indicated 3 factors with Eigenvalue over 1.0, and responsible for 76.91% of variance. Regurgitation items correlated more strongly with the third component but pain behind sternum and upper stomach pain correlated with the second component. The Greek version of RDQ seems to be a reliable and valid instrument following the pattern of the original questionnaire, and could be used in primary care research in Greece. |
topic |
gastroesophageal reflux disease, questionnaire, Greece |
url |
http://www.pagepress.org/journals/index.php/gi/article/view/4153 |
work_keys_str_mv |
AT eirinioikonomidou validationoftherefluxdiseasequestionnaireintogreek AT constantinosmihas validationoftherefluxdiseasequestionnaireintogreek AT foteinianastasiou validationoftherefluxdiseasequestionnaireintogreek AT christoslionis validationoftherefluxdiseasequestionnaireintogreek |
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