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KMID : 1812020140200040475
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Journal of Neurogastroenterology and Motility
2014 Volume.20 No. 4 p.475 ~ p.482
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Validation and Diagnostic Usefulness of Gastroesophageal Reflux Disease Questionnaire in a Primary Care Level in Mexico
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Abstract
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Background/Aims: Different non-invasive diagnostics strategies have been used to assess patients with gastroesophageal reflux. Gastroesophageal reflux disease (GERD) questionnaire (GerdQ) is a 6-item, easy to use questionnaire that was developed primarily as a diagnostic tool for GERD in primary care. Our aim was to validate and assess diagnostic utility of GerdQ questionnaire in Mexican patients in the primary care setting.
Methods: The study was performed in 3 phases: (1) a questionnaire translation and comprehension study (n = 20), (2) are a reproducibility and validation study (50 patients and 50 controls) and (3) a study to assess the clinical utility in 252 subjects with GERD symptoms. Diagnostic accuracy was calculated using endoscopy and/or pH-metry as the gold standard.
Results: Internal consistency measured by the Cronbach’s α coefficient was 0.81 for patients and 0.90 for healthy controls, with a mixed coefficient of 0.93. Reproducibility for GerdQ was very good and its discriminating validity was 88%. Most of the patients with erosive reflux and non-erosive reflux with abnormal pH-metry had scores > 8, meanwhile most of the patients with functional heartburn and hypersensitive esophagus had < 8. Sensitivity, specificity and positive predictive value of GerdQ com -pared to the gold standard were 72%, 72% and 87%, respectively.
Conclusions: In Mexico, the GerdQ questionnaire Spanish validated version is useful for GERD diagnosis in the primary care setting.
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KEYWORD
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Gastroesophageal reflux, Mexico, Questionnaires, Sensitivity and specificity
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