Table 1. Hierarchical regression analyses examining the interaction between allelic variation of risk for anxiety symptoms and adolescent safety behaviors in relation to adolescent social anxiety symptoms.

Main regression model					Post-hoc tests of moderation
Variable	ΔR2	B	SeB	β	Variable	ΔR2	B	SeB	β
Step 1	0.01				Step 3 (when “0” = at least one allele risk)	0.05*
Adolescent age		−0.33	1.73	−0.02	Allele risk score		0.54	3.88	0.01
Adolescent gender		3.48	3.81	0.09	MASC social anxiety score		2.14	0.40	0.73**
Step 2	.26**				Allele risk × MASC social anxiety score		1.48	0.61	0.32*
Allele risk score		0.54	3.88	0.01
MASC social anxiety score		0.66	0.46	0.22	Step 3 (when “0” = no allele risk)	.05*
Step 3	0.05*				Allele risk score		0.54	3.88	0.01
Allele risk × MASC social anxiety score		1.48	0.61	0.37*	MASC social anxiety score		0.66	0.46	0.22
					Allele risk × MASC social anxiety score		1.48	0.61	0.37*

For the main regression model (left side of table), regression terms for variables entered at steps 1, 2, and 3 are displayed, based on terms observed for these variables in step 3 of the model; ΔR² statistics for each step were based on variables entered in that step; for the post-hoc moderation tests (right side of table), only Step 3 is reported, with the moderator variable (i.e., allele risk) manipulated to reflect instances in which “0” equaled “at least one allele risk”, and instances in which “0” equaled “no allele risk”) (see Holmbeck 2002); MASC Multidimensional Anxiety Scale for Children

^*p<.05;

^**p<.001