Seizure (Ictal)—EEG Characteristics in Subgroups of Depressive Disorder in Patients Receiving Electroconvulsive Therapy (ECT)—A Preliminary Study and Multivariate Approach

Table 3

Mean values and standard error of mean (SEM) of the principal components (PC), summarizing spectrum of smooth density distribution of psychotic and bipolar depressed patients (PD and BD, resp.). Unipolar depressed (UD) patients cannot be differed from either psychotic or bipolar depressed patients. Fp2 denotes the left fronto-orbital EEG electrode.

Variable	Group	𝑛	Mean	SEM
PC1	PD	7	−0.50^∗∗∗	0.65
of the whole	UD	20	−0.08	0.29
spectrum of sdf	BD	6	0.85	0.43
PC2	PD	7	0.70^∗∗∗	0.29
of the whole	UD	20	−0.15	0.32
spectrum of sdf	BD	6	−0.32	0.60
PC1	PD	7	1.13^∗∗∗	1.08
of selected	UD	20	0.02	0.53
frequencies	BD	6	−1.39	0.62

^∗∗∗Significant difference between PD versus BD, 𝑃<.001.