Table 1.
Summary of results from patients with COVID‐19 and from an unmatched control group of critically ill patients without COVID‐19. The ratio of arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2) was calculated for arterial samples only. Values are reported as mean, standard deviation (SD) and 99% confidence interval (99% CI).
| COVID‐19 | CONTROL | Group with COVID‐19 showed | Unpaired t‐test (two‐tailed P value) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Mean | SD | 99% CI | n | Mean | SD | 99% CI | |||||
| p50 using Eq. 1, mmHg | 3518 | 23·37 | 3·13 | 23·23 | 23·50 | 15 945 | 24·59 | 5·42 | 24·48 | 24·70 | Lower p50 | <0·0001 |
| p50 using Eq. 2, mmHg | 3518 | 24·8 | 3·7 | 24·7 | 25·0 | 15 945 | 25·7 | 6·0 | 25·6 | 25·8 | Lower p50 | <0·0001 |
| pH | 3518 | 7·382 | 0·077 | 7·379 | 7·386 | 15 932 | 7·397 | 0·072 | 7·395 | 7·398 | Lower pH | <0·0001 |
| pO2, mmHg | 3518 | 77·9 | 28·0 | 76·7 | 79·1 | 15 945 | 86·6 | 62·5 | 85·3 | 87·8 | Lower pO2 | <0·0001 |
| SO2, % | 3518 | 94·2 | 7·9 | 93·9 | 94·6 | 15 945 | 93·1 | 10·4 | 92·9 | 93·3 | Higher SO2 | <0·0001 |
| pCO2, mmHg | 3518 | 46·1 | 11·8 | 45·5 | 46·6 | 15 936 | 43·1 | 10·1 | 42·9 | 43·4 | Higher pCO2 | <0·0001 |
| BE, mmol/l | 3518 | 1·2 | 4·3 | 1·0 | 1·3 | 15 925 | 0·7 | 4·2 | 0·6 | 0·8 | Higher BE | <0·0001 |
| Hct, % | 3483 | 26·5 | 4·0 | 26·4 | 26·7 | 15 703 | 29·7 | 6·7 | 29·6 | 29·8 | Lower Hct | <0·0001 |
| Hb, g/l | 3518 | 81·2 | 12·4 | 80·6 | 81·7 | 15 941 | 93·8 | 20·2 | 93·4 | 94·2 | Lower Hb | <0·0001 |
| PaO2/FiO2, mmHg | 2627 | 215·7 | 111·5 | 210·1 | 221·3 | 13,941 | 299·4 | 236·5 | 294·2 | 304·6 | Lower PaO2/FiO2 | <0·0001 |
| Temperature, °C | 3518 | 36·8 | 0·8 | 36·8 | 36·8 | 15 945 | 36·8 | 0·8 | 36·8 | 36·8 | NS | 0·057 |
BE, base excess; Hct, haematocrit; NS, no significant difference.
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