Background. The aim of this study was to evaluate the reliability of s
ymptoms in the diagnosis of gastroesophageal reflux disease and esopha
geal motility disorders as assessed by functional tests. Methods. In 3
65 patients referred for suspected esophageal functional disease, symp
tomatic assessment was compared with the results of esophageal manomet
ry and ambulatory 24-hour pH monitoring of the distal esophagus. Resul
ts. Based on the patients' chief complaint, the symptomatic diagnosis
was gastroesophageal reflux (44%), esophageal motor disorder (26%), ch
est pain of esophageal origin (9%), reflux and aspiration (8%), and ab
dominal pathology (12%). The symptomatic diagnosis was considerably al
tered by the results of the esophageal function tests: gastroesophagea
l reflux and motility disorders were found in all symptomatic diagnost
ic groups and a large number of patients in each group tested normal.
The sensitivity and specificity of symptom-based diagnoses for functio
nal disease were low. Conclusions. The results of this study showed th
at symptoms are an unreliable guide of esophageal abnormality, illustr
ating the need for objective testing in these patients, particularly t
o avoid inappropriate medical or surgical therapy.