Research Article
Gastroesophageal Reflux Characteristics and Patterns in Patients with Idiopathic Subglottic Stenosis
Table 2
Comparison between abnormal and normal pH impedance studies in idiopathic subglottic stenosis patients.
| | Abnormal () | Normal () | value |
| Acid exposure (pH) | | Esophageal acid exposure (%) | | | | Total | 8.9 ± 6.4 | 0.9 ± 1.4 | <0.0001 | Upright | 11.3 ± 9.5 | 1.25 ± 1.6 | 0.0002 | Supine | 4.8 ± 8.9 | 0.1 ± 0.3 | 0.0334 | Number of acid exposures | | | | Total | 84.9 ± 99.3 | 15.3 ± 14.0 | 0.0007 | Upright | 58.8 ± 33.3 | 13.2 ± 13.6 | <0.0001 | Supine | 26.4 ± 77.1 | 2.0 ± 5.8 | 0.1859 | DeMeester score | 32.6 ± 26.0 | 3.6 ± 3.9 | 0.0001 | Reflux episode activity (impedance) | | Total | 81.47 ± 48.6 | 26.4 ± 18.1 | 0.0001 | Upright | | | | Acid | 49 ± 36.3 | 8.2 ± 9.0 | 0.0001 | Nonacid | 27.5 ± 59.3 | 15.0 ± 12.4 | 0.3775 | Supine | | | | Acid | 3.9 ± 5.0 | 0.7 ± 1.8 | 0.0148 | Nonacid | 1.1 ± 2.6 | 2.5 ± 5.7 | 0.3265 | Airway symptoms | 57.9% | 42.1% | 0.1715 | BMI | 30.4 ± 8.9 | 31.3 ± 8.9 | 0.7544 | On PPI | 47.4% | 68.2% | 0.1763 | MVV | | Lowest | 48.5 ± 19.7 | 44.6 ± 20.9 | 0.5430 | Closest to pH study | 56.5 ± 20.6 | 57.0 ± 21.9 | 0.9435 |
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BMI: body mass index; PPI: proton pump inhibitor; MVV: maximum voluntary ventilation.
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