Figure 3.

Central venous oxygen saturation (ScvO₂) (percentage) in survivors and non-survivors and in patients with high and low mean ScvO₂ values. The numbers above the error bars indicate the corresponding LOS data for the different sub-groups. *Wilcoxon signed rank test versus preoperative (p < 0.05). #Mann-Whitney test versus ScvO₂ >73% (p = 0.001). ICU/IMC, intensive care unit/intermediate care unit; LOS, length of stay in hospital.