. Author manuscript; available in PMC: 2008 Jun 20.

Published in final edited form as: J Abnorm Child Psychol. 2007 Oct 27;36(3):433–444. doi: 10.1007/s10802-007-9189-1

Table 2.

Polychoric Correlations for Past Year and Lifetime Measures of Conduct Disorder (CD) and Major Depressive Disorder (MDD)

	Sample Size	CD	MDD	Cross-Twin Cross-Trait
Past Year
MZ	570 pairs	.51	.41	.22
DZ	592 pairs	.32	.11	.17
Twin-Sib	426 trios	.21	.36	.16
Lifetime
MZ	570 pairs	.56	.31	.19
DZ	592 pairs	.31	.07	.05
Twin-Sib	426 trios	.21	.30	.10