Objective:
To determine the minimum duration of electroencephalography (EEG) data necessary to differentiate EEG features of Lewy body dementia (LBD), that is, dementia with Lewy bodies and Parkinson disease dementia, from non-LBD patients, that is, Alzheimer disease and Parkinson disease.
Methods:
We performed quantitative EEG analysis for 16 LBD and 14 non-LBD patients. After artifact removal, a fast Fourier transform was performed on 90, 60, and thirty 2-second epochs to derive dominant frequency; dominant frequency variability; and dominant frequency prevalence.
Results:
In LBD patients, there were no significant differences in EEG features derived from 90, 60, and thirty 2-second epochs (all P>0.05). There were no significant differences in EEG features derived from 3 different groups of thirty 2-second epochs (all P>0.05). When analyzing EEG features derived…
