A population-based study of anxiety as a precursor for depression in childhood and adolescence

BMC Psychiatry

Table 2 Bivariate model fitting for time 1 anxiety and time 2 depression controlling for measured environmental variables

Rater	Aanx		Canx		Eanx		Ac		Cc		Ec		Adep		Cdep		Edep		χ²		AIC
Parent rated total sample -family functioning at time 1 regressed out	47***		21**		32***		12**		31**		1 ns		24*		0 ns		26***		12.59 df = 11		-9.41
Parent rated anxiety and self rated depression -family functioning at time 1 regressed out	56***		11 ns		33***		14*		14 ns		2 ns		38**		0 ns		33***		6.75 df = 11		-15.25

Ns = non significant
* p = .05
** p = .01
*** p = .001
Aanx genetic influences on anxiety
Canx common environmental influences on anxiety
Eanx non shared environmental influences on anxiety
Ac genetic influences on anxiety that also influence depression
Cc common environmental influences on anxiety that also influence depression
Ec non shared environmental influences on anxiety that also influence depression
Adep genetic influences specific to depression
Cdep common environmental influences specific to depression
Edep non shared environmental influences specific to depression
NMZ = number of MZ twin pairs
NDZ = number of DZ twin pairs
Parameter estimates equated to sum 100 in direction of arrows on each trait (anxiety time 1 & depression time 2)

ISSN: 1471-244X