. Author manuscript; available in PMC: 2008 Nov 15.

Published in final edited form as: Biol Psychiatry. 2007 Jul 9;62(10):1088–1094. doi: 10.1016/j.biopsych.2007.04.036

Table 2.

Results of model fitting of conduct disorder, major depression, and posttraumatic stress disorder.

	Additive Genetic Factor						Shared Environmental Factor

Model Number	Common			Common		Specific	Common			Common		Specific	Fit of Model

	CD	MD	PTSD	MD	PTSD	PTSD	CD	MD	PTSD	MD	PTSD	PTSD	x² (df)	p	AIC
1. Full Model													20.7 (12)	0.06	-3.3
2.	X	X	X	X	X	X							72.8 (18)	0.00	36.8
3.							X	X	X	X	X	X	41.4 (18)	0.00	5.4
4.			X			X							21.0 (14)	0.10	-7.0
5.										X	X	X	20.8 (15)	0.14	-9.2
6.			X			X				X	X	X	21.0 (17)	0.23	-13.0

Note: X = Factor loading fixed to zero; CD = conduct disorder, MD = major depression, PTSD = posttraumatic stress disorder.

Best fitting model shown in bold. Individual-specific environmental influences common and specific to each phenotype were freely estimated in all models.