Table 1.

Relevant Sociobiographical Data

	DD n = 43		Paranoid Schizophrenia n = 42		P
Age at onset in years (mean ± SD)	46.9	13.2	35.3	13.9	<.001a
No. of previous episodes (mean ± SD)	0.47	1.6	1.76	2.05	<.001a
Birth complications (n, %)	4	9.3	4	9.5	>.999b
Developmental disturbance (n, %)	4	9.3	5	11.9	.738b
“Broken home” situation (n, %)	14	32.6	26	61.9	.007c
Mental illness in first-degree relative (any disorder) (n, %)	10	23.3	17	40.5	.088c
Mental illness in first-degree relative (only psychotic or major affective disorders) (n, %)	5	11.6	7	16.7	.505c
Mental illness in first-degree relative (affective disorders) (n, %)	4	9.3	0	0.0	.116b
Mental illness in first-degree relative (psychotic disorders) (n, %)	1	2.3	7	16.7	.030b
Educational level
Very low (n, %)	3	7.0	4	9.5	.654d
Low (n, %)	18	41.9	14	33.3
Medium (n, %)	12	27.9	21	50.0
High (n, %)	10	23.3	3	7.1

Note: delusional disorder, DD

^at test.

^bFisher's exact test.

^cχ² test.

^dMann-Whitney U test.