Reduced duration mismatch negativity in adolescents with psychotic symptoms: further evidence for mismatch negativity as a possible biomarker for vulnerability to psychosis

Table 2 The means and standard deviations of demographic variables overall and for each group

Variable	Overall	At-risk	Controls	F & P values P<0.05
Variable	Overall	(N=14)	(N=22)	F & P values P<0.05
Age (Mean Years/SD)	11.48 (.60)	11.57 (.85)	11.41 (.50)	X ²=6.166, df=2, p=.104
Sex (Male; Female)	16 M; 20 F	8 M; 6 F	8 M; 14 F	X ²=.773, df=1, p=.379
Handedness	35 R; 5 L	13 R; 1 L	19 R; 3 L	X ²=.000, df=1, p=1.000
SES (N=Professional/Managerial & Other)	N=34; 6 Other	N=11; 3 Other	N=19; 2 Other	X ²=.255, df=1, p=.613

Note: SES=Socio-economic Status; Number of participant’s parents occupations in Professional/Managerial or Other roles.

ISSN: 1471-244X