To evaluate the application of Gerd Q in the diagnosis of gastroesophageal reflux disease(GERD)in patients with gastroesophageal reflux disease.

Patients were selected from June 2015 to June 2016 in People′s Hospital of Xinjiang Uygur Autonomous Region who was suspected as GERD and ask them to fill the Gerd Q. All patients received Gerd Q questionnaire survey, gastroscope, 24h pH monitoring of esophageal and/or proton pump inhibitor(PPI)treatment.gastroscope, 24h pH monitoring of esophageal and/or PPI treatment were regarded as golden diagnosis standards.The results were compared with Gerd Q scores, in order to calculate the diagnostic sensitivity, specificity and accuracy of Gerd Q.

Gerd Q scores were mainly concentrated in 7~14 points, and non GERD group mainly concentrated below 7 points, after the Gerd Q diagnostic threshold increases, the sensitivity decreases and the specificity increases, when the area under the ROC curve is 0.802 the best diagnostic sensitivity and specificity were 77.5% and 87.3% respectively when score 8 was set as the critical value for the Gerd Q, The Youden index reached a maximum of 0.648.The positive coincidence rate of diagnosis in patients with GERD was 77.72%, and the negative coincidence rate was 87.8%.

The Gerd Q is a good screening test for the diagnosis of GERD, the preliminary diagnosis rate is high, which can be used as a noninvasive, simple, easy, economical and effective method for the clinical diagnosis of GERD.