Table 2.
Diagnostic efficacy of MII-pH in diagnosing GERC.
| Parameters | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) | Kappa | Area under ROC curve |
|---|---|---|---|---|---|---|
| AET and SAP | 92.6 | 63.6 | 94.0 | 58.3 | 0.512 | 0.863 |
| AET | 63.2 | 63.6 | 91.5 | 21.9 | 0.149 | 0.657 |
| SAP for acidic reflux | 25.7 | 100 | 100 | 17.9 | 0.088 | 0.721 |
| SAP for non-acidic reflux | 22.1 | 100 | 100 | 17.2 | 0.073 | 0.714 |
AET: esophageal acid exposure time; GERC: gastroesophageal reflux-induced chronic cough; MII-pH: multichannel intraluminal esophageal impedance-pH monitoring; ROC: receiver operating curve; SAP: symptom association probability.