Contingency table analysis for mITT subgroup of subjects in ICU
| NGPOD (ITT) | pH aspirate (ITT) | Total; N (%) | |
| pH ≥5.5 or no result | pH ≤5.5 (in stomach) | ||
| Red or no result | 66 | 21 | 87 (39.5) |
| Green | 49 | 84 | 133 (60.5) |
| Total; N (%) | 115 (52.3) | 105 (47.7) | 220 (100) |
Difference between discordant cells: −12.73%, 95% CI −19.99% to −5.47%.
Exact probability (binomial distribution): p=0.0011.
ICU, intensive care unit; mITT, modified intention to treat; NGPOD, novel fibre-optic pH test device.