Relationship between glycaemia and outcome from NIV
| Random blood glucose quartile (mmol/l) | NIV success (no of cases) | NIV failure (no of cases) |
| 0–6 (n = 28) | 27 (96%) | 1 (4%) |
| 6–6.9 (n = 16) | 16 (100%) | 0 (0%) |
| 7–8.9 (n = 26) | 17 (65%) | 9 (35%) |
| >9 (n = 18) | 12 (67%) | 6 (33%) |
NIV, non-invasive ventilation.