Fig. 5. Median and quartile values of ( A ) Bispectral Index, ( B ) combined wavelet subband entropy 4–16 Hz, and ( C ) wavelet subband entropy 16–32 Hz for each electroencephalographic class. AW = awake activity; BS = burst suppression; D =δ activity; DS = slow δ activity; DSM = slow δ monophasic activity; DSMS = slow δ monophasic activity with spikes; PD = periodic discharges; SBS = burst suppression with spikes. *Statistical significance ( P < 0.05) between classes.