Effects of different intubation criteria on age at intubation and rate of unnecessary intubations
| Age at intubation (h) | |||
|---|---|---|---|
| Median (IQR) | p Value | Additional intubations of responders, n (%) | |
| FiO2≥0.6 (1 h) or PCO2≥65 mm Hg or apnoeas | 5.6 (3.3–19.3) | – | |
| FiO2≥0.35 (1 h) or PCO2≥65 mm Hg or apnoeas | 3.1 (2.2–5.2) | <0.05 | 11 (16) |
| FiO2≥0.40 (1 h) or PCO2≥65 mm Hg or apnoeas | 3.8 (2.5–8.7) | <0.05 | 6 (9) |
| FiO2≥0.45 (1 h) or PCO2≥65 mm Hg or apnoeas | 4.4 (2.7–10.9) | NS | 4 (6) |
| FiO2≥0.60 (1 h) or PCO2≥50 mm Hg or apnoeas | 2.2 (1.3–7.6) | <0.05 | 31 (46) |
| FiO2≥0.60 (1 h) or PCO2≥55 mm Hg or apnoeas | 3.9 (2.0–12.3) | NS | 17 (25) |
| FiO2≥0.60 (1 h) or PCO2≥60 mm Hg or apnoeas | 5.0 (2.3–14.6) | NS | 6 (9) |
FiO2, fraction of inspired oxygen; PCO2, partial pressure of carbon dioxide.