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Table 2 Comparisons of the attenuations in Hounsfield units in regions of interest and of the gray matter-to-white matter ratio between groups

From: Early brain computed tomography findings are associated with outcome in patients treated with therapeutic hypothermia after out-of-hospital cardiac arrest

    Good outcome (N = 21) Poor outcome (N = 30) P
Basal ganglia Gray matter CN 37.6 ± 1.4 36.6 ± 1.8 0.030
  PU 38.3 ± 1.7 36.7 ± 2.5 0.038
White matter CC 29.8 ± 2.0 29.8 ± 2.2 0.946
  PIC 29.0 ± 2.0 29.9 ± 2.2 0.094
Centrum semiovale Gray matter MC1 36.8 ± 1.3 35.9 ± 2.0 0.072
White matter MW1 30.3 ± 1.9 30.3 ± 3.2 0.990
High convexity area Gray matter MC2 37.8 ± 1.9 36.1 ± 2.4 0.043
White matter MW2 30.5 ± 1.7 30.4 ± 3.0 0.927
Gray-White matter Ratio (GWR)    
 Basal ganglia 1.30 ± 0.09 1.23 ± 0.07 0.005
 Cerebrum 1.23 ± 0.06 1.19 ± 0.07 0.041
 Average 1.26 ± 0.07 1.21 ± 0.06 0.003
  1. CN caudate nucleus, PU putamen, CC corpus callosum, PIC posterior internal capsule, MC1 medial cortex at the centrum semiovale, MW1 medial white matter at the centrum semiovale, MC2 medial cortex at the high convexity level, MW2 medial white matter at the high convexity level, GWR Basal ganglia = (CN + PU)/(CC + PIC); GWR Cerebrum = (MC1 + MC2) / (MW1 + MW2); GWR Average = (GWR Basal ganglia + GWR Cerebrum)/2.