Table 3.

Mediation models of AUDIT, BDI-II score, and brain activation (β) each for win > nil and loss > nil.

			p Values
X	M	Y	X → M	M → Y	X → Y	Mediated X → Y	Mediation
Win > Nil
AUDIT	BDI	Brain	<0.001	0.006	<0.001	<0.001	0.021
Brain	BDI	AUDIT	<0.001	0.190	<0.001	<0.001	0.204
AUDIT	Brain	BDI	<0.001	0.006	<0.001	0.190	0.013
BDI	Brain	AUDIT	<0.001	<0.001	<0.001	0.190	0.005 *
Brain	AUDIT	BDI	<0.001	0.190	<0.001	0.006	0.201
BDI	AUDIT	Brain	<0.001	<0.001	<0.001	0.006	0.009
Loss > Nil
AUDIT	BDI	Brain	<0.001	0.010	<0.001	<0.001	0.029
Brain	BDI	AUDIT	<0.001	0.149	<0.001	<0.001	0.166
AUDIT	Brain	BDI	<0.001	0.010	<0.001	0.149	0.020
BDI	Brain	AUDIT	<0.001	<0.001	<0.001	0.149	0.006 *
Brain	AUDIT	BDI	<0.001	0.149	<0.001	0.010	0.162
BDI	AUDIT	Brain	<0.001	<0.001	<0.001	0.010	0.009

Note: The mediation models were evaluated at a corrected p = 0.05/6 = 0.0083. * p < 0.0083. A significant mediation and non-significant mediated X → Y suggest that M completely mediates the correlation of X and Y.