Table 3.
Comparison between hemoglobin saturation measured by oximetry and calculated with the different prediction equations.
| a) Arterial blood | Historical control group | Synchronous control group | Covid-19 patients |
|---|---|---|---|
| Measured SaO2 (%) | 94.4 ± 4.9 | 94.8 ± 4.1 | 95.0 ± 3.9 |
| SaO2 Kelman (%) | 94.5 ± 5.0 | 94.9 ± 4.2 | 95.0 ± 3.8 |
| ICC vs. Measured SaO2 | 0.989 [0.988−0.990] | 0.991 [0.988−0.993] | 0.993 [0.991−0.994] |
| SaO2 Kelman (%) | 94.5 ± 5.1 | 95.0 ± 4.1 | 95.0 ± 4.0 |
| ICC vs. Measured SaO2 | 0.987 [0.986−0.988] | 0.990 [0.987−0.993] | 0.992 [0.991−0.993] |
| SaO2 Siggaard-Andersen (%) | 94.4 ± 5.0 | 94.8 ± 4.1 | 94.8 ± 3.9 |
| ICC vs. Measured SaO2 | 0.987 [0.986−0.988] | 0.991 [0.988−0.993] | 0.992 [0.990−0.994] |
| b) Venous blood | Historical control group | Synchronous control group | Covid-19 patients |
|---|---|---|---|
| Measured SaO2 (%) | 60.3 ± 17.9 | 60.1 ± 18.0 | 61.6 ± 18.8 |
| SaO2 Kelman (%) | 60.0 ± 17.4 | 59.5 ± 17.3 | 61.1 ± 18.2 |
| ICC vs. measured SaO2 | 0.991 [0.990−0.991] | 0.990 [0.988−0.991] | 0.995 [0.994−0.996] |
| SaO2 Severinghaus (%) | 60.1 ± 18.2 | 59.6 ± 18.1 | 61.4 ± 19.0 |
| ICC vs. measured SvO2 SvO2 | 0.990 [0.989−0.990] | 0.989 [0.987−0.990] | 0.995 [0.994−0.996] |
| Siggaard-Andersen (%) | 60.2 ± 18.2 | 59.6 ± 18.1 | 61.4 ± 19.0 |
| ICC vs. measured SaO2 | 0.990 [0.989−0.990] | 0.989 [0.987−0.990] | 0.995 [0.994−0.996] |
ICC: intraclass correlation coefficient; SaO2: oxygen saturation in arterial blood; SvO2: oxygen saturation in venous blood.