. Author manuscript; available in PMC: 2016 Nov 3.

Published in final edited form as: Psychiatr Genet. 2015 Jun;25(3):127–130. doi: 10.1097/YPG.0000000000000083

Table 1.

Demographic Characteristics by Group

	SCPs (n=320)	Non-SCPs (n=109)	Test	p-value

Mean Age in Years (SD=standard deviation)	16.0 (SD=1.1)	16.1 (SD=1.4)	t(159.7 ) = 0.4	NS

Sex			c²(1) = 29.7	< 0.0005
Male	80.0% (n=256)	53.2% (n=58)
Female	20.0% (n=64)	46.8% (n=51)

Ethnicity			c²(2 )= 13.1	0.001
White	52.7% (n=169)	58.7% (n=64)
Hispanic	21.3% (n=68)	6. 4% (n=7)
Other	26.0% (n=83)	34.9% (n=38)

Mean Highest Grade (SD)	9.4 (SD=1.2)	9.9 (SD=1.4)	t( 427) = 4.0	< 0.0005