Test Characteristics According to the Cutoff Value of Reflux Symptom Index Score to Diagnose Gastroesophageal Reflux Disease in Patients With Suspected Laryngopharyngeal Reflux Symptoms
| Cutoff score of RSI | Sensitivity%(95% CI) | Specificity%(95% CI) | PPV%(95% CI) | NPV%(95% CI) |
|---|---|---|---|---|
| 23 | 42.9 (17.7-71.1) |
69.5 (58.4-79.2) |
19.4 (7.5-37.5) |
87.7 (77.2-94.5) |
| 24 | 42.9 (17.7-71.1) |
75.6 (64.9-84.4) |
23.1 (9.0-43.6) |
88.6 (78.7-94.9) |
| 25 | 42.9 (17.7-71.1) |
79.3 (68.9-87.4) |
26.1 (10.2-48.4) |
89.0 (79.5-95.1) |
| 26 | 35.7 (12.8-64.9) |
80.5 (70.3-88.4) |
23.8 (8.2-47.2) |
88.0 (78.4-94.4) |
| 27 | 35.7 (12.8-64.9) |
84.1 (74.4-91.3) |
27.8 (9.7-53.5) |
88.5 (79.2-94.6) |
RSI, Reflux symptom index; PPV, positive predictive value; NPV, negative predictive value.