. Author manuscript; available in PMC: 2007 Jun 7.

Published in final edited form as: Br J Psychiatry. 2006 Oct;189:324–329. doi: 10.1192/bjp.bp.105.014316

Table 1.

Sample characteristics

Characteristic	Index (n=33)		Control (n=23)
Non-manual social class, n (%)	17	(51.5)	13	(56.5)	ϰ²=0.009,NS
Manual social class, n (%)	16	(48.5)	10	(43.5)
Boys, n (%)	15	(45.5)	13	(60.9)	ϰ²=0.295, NS
Girls, n (%)	18	(54.5)	10	(39.1)
Maternal age at follow-up, years: mean (range)	37.3	(31-51)	38	(31-48)	t=0.53,NS

NS, not significant.