Figure 2.

Survival probabilities at day 28 by the development of mixed venous-to-arterial carbon dioxide difference during the first 6 hours of resuscitation. Log-rank, Mantel–Cox: 19.21, P <0.001. H-H, mixed venous-to-arterial carbon dioxide difference (Pv-aCO₂) high at Time 0 (T0) and 6 hours later (T6); L-H, Pv-aCO₂ normal at T0 and high at T6; H-L, Pv-aCO₂ high at T0 and normal at T6; and L-L, Pv-aCO₂ normal at T0 and T6.