Table 1.

Characteristics of subjects

	Patients		Controls		Differences P value
	Mean	SD	Mean	SD
Mean age in years	31.2	7.1	28.2	2.7	0.10a
Gender	10 f/9 m		10 f/9 m		1.0b
Education in years	13	3	14	2	0.26
Verbal IQ	102.05	8.9	108.88	12.9	0.09a
TMT‐A	24	11	19	8	0.13a
TMT‐B	41	17	32	10	0.10a
Digit span forward	8.4	1.9	9.3	1.1	0.09a
Digit span backward	7.7	1.9	7.4	2.3	0.62a
BDI‐II	23.26	9.24
HAMD	14.53	4.21
PANAS positive	2.99	0.60	3.44	0.40	0.01a
PANAS negative	1.81	0.58	1.34	0.24	0.01a

Patients were clinically assessed using two different scales Beck Depression Inventory [BDI‐II]; Hamilton scale [HAMD]. By applying the trial making test [TMT‐A and B], attention and task switching were tested. The premorbid IQ was determined by using a German verbal crystallized intelligence estimation Mehrfachwahlwortschatztest [Verbal IQ]. Working memory storage capacity was tested by the digit‐span test. Additionally, the Positive and Negative Affect Schedule PANAS assessed current mood.

SD = standard deviation.

^aIndependent sample t‐test.

^bPearson χ² test.