Table 1.

Demographic and clinical characteristics

	Young adult-onset schizophrenia (n = 15)	Healthy controls (n = 22)	Statistics	Adolescent-onset schizophrenia (n = 12)	Healthy controls (n = 15)	Statistics
Age (in years)	25.74 ± 8.46*	27.07 ± 7.14*	t = 0.52, p = 0.61	19.59 ± 1.52*	19.16 ± 1.32*	t = 0.76, p = 0.47
Sex
Male	11	5	Fisher’s exact test, p = 0.006	10	7	Fisher’s exact test, p = 0.11
Female	4	17		2	8
C4AL repeats
1 copy	4	4	Fisher’s exact test, p = 0.69	1	2	Fisher’s exact test, p = 1.00
2 or more copies	11	18		11	13
C4BL repeats
0 copy	8	15	Fisher’s exact test, p = 0.23	7	4	Fisher’s exact test, p = 0.27
1 copy	5	2		4	9
2 or more copies	2	5		1	2
Duration of illness (in years)	2.37 ± 1.62	–	–	3.99 ± 0.90	–	–