Test Characteristics According to the Cutoff Value of Gastroesophageal Reflux Disease Questionnaire Score to Diagnose Gastroesophageal Reflux Disease in Patients With Suspected Laryngopharyngeal Reflux Symptoms
| Cutoff score of GerdQ | Sensitivity%(95% CI) | Specificity%(95% CI) | PPV%(95% CI) | NPV%(95% CI) |
|---|---|---|---|---|
| 7 | 57.1 (28.9-82.3) |
36.6 (26.2-48.0) |
13.3 (5.9-24.6) |
83.3(67.2-93.6) |
| 8 | 57.1 (28.9-82.3) |
58.5 (47.1-69.3) |
19.0 (8.6-34.1) |
88.9 (77.4-95.8) |
| 9 | 50.0 (23.0-77.0) |
70.7 (59.6-80.3) |
22.6 (9.6-41.1) |
89.2 (79.1-95.6) |
| 10 | 35.7 (12.8-64.9) |
82.9 (73.0-90.3) |
26.3 (9.2-51.2) |
88.3 (79.0-94.5) |
GerdQ, gastroesophageal reflux questionnaire; PPV, positive predictive value; NPV, negative predictive value.