Table 3.

Estimated Coefficients from Linear Regression Models¹ Predicting CES-D in 2006 (n=984)

Variable	(1)	(2)	(3)
Age	0.081**	0.081***	0.081***
Female	1.199**	1.150**	1.228***
Respondent’s years of schooling	−0.153**	−0.170***	−0.158***
5-HTTLPR genotype
S/S (ref group)
S/L	−0.012	−0.014	−0.041
S/XL	0.656	0.513	0.818
L/L or L/XL	−0.235	−0.335	−0.000
2+ Traumas (lifetime)	2.165**	--	2.108**
2+ Traumas x S/L	1.383	--	0.983
2+ Traumas x S/XL	−4.0222	--	−3.945
2+ Traumas x (L/L or L/XL)	−5.385*3	--	−5.301*4
Joint test for interaction terms (df=3)	Χ2=9.3, p~0.025	--	Χ2=8.0, p~0.047
2+ Life Events (past yr)	--	1.897*	1.881*
2+ Life Events x S/L	--	1.076	0.539
2+ Life Events x S/XL	--	−1.423	−1.508
2+ Life Events x (L/L or L/XL)	--	−2.240	−2.022
Joint test for interaction terms (df=3)	--	Χ2=3.7, p~0.294	Χ2=2.3, p~0.521
Constant	−0.235	−0.113	−0.454

^*p<0.05,

^**p<0.01, two-tailed tests.

¹Models include a random effect for township of residence to adjust for the clustered sampling design.

²The difference between this coefficient and the coefficient for 2+ Traumas x S/L is marginally significant (Wald test: Χ²=2.9, df=1, p~0.09).

³This coefficient differs significantly from the coefficient for 2+ Traumas x S/L (Wald test: Χ²=7.2, df=1, p~0.01).

⁴This coefficient differs significantly from the coefficient for 2+ Traumas x S/L (Wald test: Χ²=6.2, df=1, p~0.01).