Fig. 2

Kaplan–Meier survival curve of the “hyperoxia” (red line) and “normoxia” (black line) groups for: a the subgroup of patients with hyperlactatemia > 2 mmol/L at baseline. Log-rank test between the two randomization arms, p = 0.054 and p = 0.171 at day 28 and 90, respectively. b The subgroup of patients with lactatemia ≤ 2 mmol/L at baseline. Log-rank test between the two randomization arms, p = 0.680 and p = 0.513 at day 28 and 90, respectively