ENO2 and brain injury: In addition, the brain injury group reported lower rSO2 (%) (27.0 ± 7.3 vs. 17.5 ± 6.1, P < 0.001) and cerebral blood flow (%) (44.9 (IQR 37.8–69.2) vs. 29.1 (IQR 12.0–48.2), P = 0.004) values and larger concentrations of NSE (36.7 (IQR 30.2–49.3) vs. 10.6 (IQR 3.8–12.4), P < 0.001) than the control group (Table 2).