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[Questionnaires for GERD, QUEST and F scale].

The initial diagnosis of GERD is based on the history or on questionnaires such as QUEST and FSSG(F scale): frequency scale for the symptoms of GERD. A higher QUEST score only signifies that an event is more typical of gastroesophageal reflux than of other conditions, so changes in the score for QUEST cannot be used to assess the severity of GERD or the response to treatment. We developed a simplified questionnaire, F scale, for evaluation of the symptoms of GERD. The results of F scale correlated strongly with the endoscopic findings, therefore, use of F scale would allow objective assessment of the therapeutic effect of various PPIs, including on demand therapy.