Figure 4

ROC curve analysis for hemodynamic parameters in the SRMV group and MCA group. The results showed that ΔCBF in the SRMV group and ΔCBV in the MCA group had relatively high diagnostic accuracy (SRMV group: ΔCBF, AUC = 0.8586, 95% CI 0.7311–0.9860, p = 0.0003; ΔCBV, AUC = 0.8158, 95% CI 0.6700–0.9616, p = 0.0015. MCA group: ΔCBF, AUC = 0.7993, 95% CI 0.6378–0.9608, p = 0.0026; ΔCBV, AUC = 0.8684, 95% CI 0.7462–0.9907, p = 0.0002). Conversely, the diagnostic accuracy of ΔTTP1/2 in both groups was low (AUC = 0.5987, AUC = 0.5822).