Table 3.

Statistical analyses of the combinatory effects

Combination effects	n	Z	P
The first combination effects
TCD+EEG vs TCD+SLSEP	111	0.622	0.481
EEG+SLSEP vs TCD+SLSEP	111	2.837	0.007
TCD+EEG vs EEG+SLSEP	111	−1.576	0.137
The second combinatory effects
EEG+SLSEP vs TCD+SLSEP	105	3.638a	<0.001
TCD+SLSEP vs TCD+EEG	105	−2.333b	0.020
EEG+SLSEP vs TCD+EEG	105	1.633a	0.102
Effects of cerebral trauma on combinatory effects
EEG+SLSEP vs TCD+EEG	111	0.500a	0.617
TCD+SLSEP vs EEG+SLSEP	111	−2.714b	0.007
TCD+SLSEP vs TCD+EEG	111	−2.333b	0.020

^aBased on negative ranks;

^bBased on positive ranks;

“+” stands for combinatory