Spearman rank correlation between severity of disease and baseline ROS and RNS levels
| SAPS II | SOFA | Lactate | ||||
| Rho | P value | Rho | P value | Rho | P value | |
| MPO | 0.16 | 0.15 | 0.40 | <0.001 | 0.33 | 0.003 |
| SOD | 0.55 | <0.001 | 0.70 | <0.001 | 0.59 | <0.001 |
| HO-1 | 0.35 | 0.003 | 0.68 | <0.001 | 0.39 | <0.001 |
| Nitrite+nitrate | 0.27 | 0.02 | 0.25 | 0.03 | 0.15 | 0.19 |
HO-1, heme oxygenase-1; MPO, myeloperoxidase; RNS, reactive nitrogen species; ROS, reactive oxygen species; SAPS II, Simplified Acute Physiology Score II; SOD, superoxide dismutase; SOFA, Sequential Organ Failure Assessment.