Table 2.
Characteristics of COVID-19 patients after intubation
| Early intubation | Non-early intubation | Standardized difference | |
|---|---|---|---|
| Arterial blood gas assay | |||
| P/F ratio, median (IQR) | 195 (167–299) | 159 (132–211) | 0.654 |
| PaO2, mm Hg, median (IQR) | 120 (94–156) | 96 (77–137) | 0.233 |
| pH, median (IQR) | 7.37 (7.33–7.41) | 7.36 (7.31–7.41) | 0.000 |
| PaCO2, mm Hg, median (IQR) | 40 (38–42) | 43 (37–48) | 0.483 |
| Lactate, ≥ 2 mmol/L, n (%) | 17 (4.6%) | 24 (7.1%) | 0.108 |
| MV setting, median (IQR) | |||
| FiO2 | 0.5 (0.5–0.7) | 0.6 (0.5–1.0) | 0.509 |
| Tidal volume, mL | 450 (400–480) | 430 (380–500) | 0.012 |
| Respiratory rate, breaths/min | 18 (15–20) | 16 (15–20) | 0.196 |
| MV measurements, median (IQR) | |||
| Peak inspiratory pressure, cmH2O | 23 (20–24) | 24 (21–27) | 0.437 |
| Mean inspiratory pressure, cmH2O | 14 (11–15) | 14 (12–16) | 0.130 |
The numbers in the table were adjusted by weighing with propensity scores
COVID-19 coronavirus disease 2019, IQR interquartile range, P/F PaO2/FiO2, PaO2 partial pressure of oxygen, PaCO2 partial pressure of carbon dioxide, FiO2 fraction of inspired oxygen, MV mechanical ventilation