Cerebral (rStO2) and peripheral (SpO2) oxygen saturation according to level of inspired supplemental oxygen (FiO2)
| FiO2 value (%) | rStO2% (SD) (n) | SpO2% (SD) (n) |
|---|---|---|
| 21 | 64.9 (15.9) (580) | 94.5 (5.2) (711)* |
| 22–29 | 67.3 (14.8) (376)† | 92.8 (4.6) (447) |
| ≥30 | 63.8 (11.8) (149)† | 92.0 (4.1) (180) |
*Differences between 21% and the other two FiO2 strata (p<0.001).
†Differences between 21% and 22%–29% FiO2 strata (p=0.001).