Somatic oxygen saturation
hypoxia
HYPOXIA
The root-mean-square error accuracy between quadriceps oxygen saturation and somatic reference oxygen saturation was 6.0%. The mean bias and SD between quadriceps oxygen saturation and somatic reference was 0.8 ± 4.3% with limits of agreement from − 7.7 to 9.3% (Fig. 
Bland-Altman plots for somatic oxygen saturation. The solid horizontal lines represent the bias (mean) and limits of agreement (mean ± 1.96 SD) between O3-derived oxygen saturation values measured at the quadriceps (
Bin-wise analysis: Bias, SD and root-mean-square error accuracy at different levels of tissue hypoxia* p < 0.001 vs. 80
Uncertainty analysis. Bias, SD and root-mean-square error accuracy with different venous-to-arterial blood contribution ratios