pH metry parameter | Group 1 gastrointestinal median (min max) | Group 2 respiratory median (min- max) | Group 3 mixed median (min-max) | P |
---|---|---|---|---|
Number of reflux episodes greater than 5 minutes in 24 | 2 (1-21) | 3 (0-22) | 2.5 (2-9) | 0.682 |
Number of reflux episodes in 24 hours | 74 (40-426) | 61.5 (20-271) | 92 (74-197) | 0.286 |
Duration of the longest reflux episode | 20 (10-260) | 23 (10-146 | 24 (7-29) | 0.919 |
The reflux index | 8 (4-77.8) | 7.8 (5-65) | 10.3 (7.8-16) | 0.576 |
Fraction of time with pH lower than 4 pH > 5 (%) | 2.7 (0-6) | 2 (0-10.9) | 6 (4.7-11.5) | 0.004 |