Contingency table analysis for mITT subgroup undergoing initial testing
| NGPOD (ITT) | pH aspirate (ITT) | Total; N (%) | |
| pH ≥5.5 or no result | pH ≤5.5 (in stomach) | ||
| Red or no result | 6 | 1 | 7 (7.3) |
| Green | 12 | 77 | 89 (92.7) |
| Total; N (%) | 18 (18.8) | 78 (81.2) | 96 (100) |
Difference between discordant cells: −11.46%, 95% CI −18.45% to −4.46%.
Exact probability (binomial distribution): p=0.0034.
mITT, modified intention to treat; NGPOD, novel fibre-optic pH test device.