. Author manuscript; available in PMC: 2021 Jun 7.

Published in final edited form as: Psychol Med. 2015 Mar 2;45(11):2275–2284. doi: 10.1017/S0033291715000227

Table 1.

Demographic and clinical characteristics of the groups

	CHR (n = 735)	Controls (n = 278)	Statistics	p
Sex
Male	424 (57.6)	140 (50.4)	χ² = 4.23	0.04
Female	311 (42.4)	138 (49.6)
Race
First Nations	14 (1.9)	4 (1.4)	χ² = 6.69	0.67
Asian	55 (7.4)	30 (10.8)
Black	109 (14.8)	48 (17.3)
Latin America/Middle East/White	461 (62.7)	166 (59.7)
Native Hawaiian/Pacific Islander	3 (0.4)	1 (0.4)
Inter-racial	92 (12.5)	29 (10.4)
Mean age, years (s.d.)	18.5 (4.2)	19.6 (4.7)	t = 3.89	<0.001
Mean duration of education, years (s.d.)	11.3 (2.8)	12.7 (3.6)	t = 6.43	<0.001

Data are given as number of participants (percentage) unless otherwise indicated.

CHR, Clinical high risk; s.d., standard deviation.