. Author manuscript; available in PMC: 2011 Jan 1.

Published in final edited form as: Neuropsychology. 2010 Jan;24(1):109–120. doi: 10.1037/a0016791

Table 3.

Baseline Demographic Characteristics

		Normal Controls (N=29)	At-Risk (N=46)	First Episode (N=18)	F/χ² Tests	P
Age (mean/SD)	Baseline: Follow-Up:	19.0 (5.2) 19.9 (5.2)	18.7(4.2) 19.8(4.1)	20.1 (5.7) 21.0 (5.7)	F(2,94)=.63	.53
Gender (% male)		48.3%	58.3%	85%	χ²(2)=6.95	<.05
Ethnicity (% Caucasian)		58.6%	60.4%	65%	χ²(24)=20.03	.69
Handedness (% right)		89.7%	89.1%	75%	χ²(4)=6.67	.15
Education (mean/SD)		11.9 (4.4)	11.2 (2.8)	11.4 (2.8)	F(2,94)=.38	.68
Parental Education (mean/SD)		16.1 (2.3)	15.5 (2.3)	15.3 (2.9)	F(2,87)=.72	.49
Follow-Up Interval (mean/range in months)		12 (6-36)	20.5 (6-36) 14.6 (6-36)