. 2006 May 17;32(3):507–524. doi: 10.1093/schbul/sbj078

Table 2.

Demographic Characteristics of HR-SCZ, HR-AFF, and CC Groups

	Total Sample
	HR-SCZ	HR-AFF	CC
	(n = 73)	(n = 18)	(n = 84)
	Mean (SD)	Mean (SD)	Mean (SD)	Test Statistic	p
Age	18.1 (3.5)	17.7 (3.7)	16.9 (3.2)	F = 2.03	.135
Subject Education	10.8 (2.4)	11.2 (3.6)	10.9 (2.9)	F = .066	.937
Parental Education	13.2 (2.8)	13.8 (3.7)	14.2 (2.4)	F = 2.65	.073
Female (%)	42 (57.5%)	14 (77.8%)	47 (56.0%)	χ² = 3.01	.222
Caucasian (%)	38 (52.1%)	11 (61.1%)	42 (50.0%)	χ² = .733	.693
Right-handed (%)	61 (83.6%)	16 (88.9%)	72 (85.7%)	χ² = 2.12	.715
	Harvard Adolescent High Risk Study
	HR-SCZ	HR-AFF	CC
	(n = 35)	(n = 6)	(n = 35)
	Mean (SD)	Mean (SD)	Mean (SD)	Test Statistic	p
Age	19.1 (3.8)	17.6 (3.6)	17.7 (4.0)	F = 1.13	.328
Subject Education	10.9 (2.5)	9.8 (3.3)	11.3 (3.4)	F = .627	.537
Parental Education	12.7 (2.7)	11.2 (4.3)	13.5 (2.7)	F = 1.94	.151
Female (%)	20 (57.1%)	4 (66.7%)	20 (57.1%)	χ² = 1.09	.579
Caucasian (%)	20 (57.1%)	3 (50.0%)	20 (57.1%)	χ² = .044	.978
Right-handed (%)	31 (88.6%)	5 (83.3%)	30 (85.7%)	χ² = 2.60	.627
	Hillside Family Study
	HR-SCZ	HR-AFF	CC
	(n = 38)	(n = 12)	(n = 49)
	Mean (SD)	Mean (SD)	Mean (SD)	Test Statistic	p
Age	17.1 (2.9)	17.7 (3.9)	16.3 (2.3)	F = 2.42	.174
Subject Education	10.7 (2.3)	11.8 (3.7)	10.5 (2.4)	F = 1.29	.280
Parental Education	13.7 (2.8)	14.7 (3.1)	14.6 (2.2)	F = 1.62	.204
Female (%)	22 (57.9%)	10 (83.3%)	27 (55.1%)	χ² = 2.03	.362
Caucasian (%)	18 (47.4%)	8 (75.0%)	22 (44.9%)	χ² = 1.14	.566
Right-handed (%)	30 (78.9%)	11 (91.7%)	42 (85.7%)	χ² = .822	.935

Note: HR-SCZ = genetic high-risk for schizophrenia; HR-AFF = genetic high-risk for affective psychosis; CC = community control. For the Total Sample analyses, there is a site effect for parental education (F = 11.78, p = .001). There were no other significant site or group by site interactions.