Graphical reclassification: probabilities of death obtained with blood lactate (A, C) and base deficit (B, D) knowing Mechanism, Glasgow, Age, arterial Pressure (MGAP) score (A, B) or Trauma Related Injury Severity Score (TRISS; C, D) in the whole population (n = 1,075). The outcome is in-hospital mortality, defined as death occurring within 30 days after hospital admission or before discharge when discharge occurred within 30 days. Deceased patients (red dot) were expected to have a higher probability of death when initial blood lactate levels or base deficit was included (i.e., correct reclassification) and be in the red sector. On the contrary, survivors (green dot) should have a lower probability of death when initial blood lactate levels or base deficit was included and be in the green sector. For patients in the gray sector (i.e., less than 30% difference between both probabilities), blood lactate or base deficit did not change significantly the probability given by either MGAP or TRISS (not clinically relevant reclassification). Color mismatches (e.g., red patients in green sector) represent significant misclassification.