Table 1. Electroencephalogram results - background alterations.

EEG	Frequency	Percentage
Normal	5	17.9
Predominant theta activity	10	35.7
Burst-suppression	1	3.6
Slow background posterior activity <8 Hz	3	10.7
Triphasic waves	2	7,1
Diffuse attenuation	7	25.0
Total	28	100.0

EEG: electroencephalogram.