The primary objective of this study is to determine the accuracy of the Reflux Disease
Questionnaire (RDQ) as a diagnostic test for gastroesophageal reflux disease. Symptom
evaluation by the RDQ will be compared with other established approaches to the diagnosis of
gastroesophageal reflux disease (GERD) in a primary care patient population with symptoms
thought to be of upper gastrointestinal (GI) tract origin.