Table 2.

Linear mixed model analysis of Iowa Gambling Task (IGT) performance by familial risk and 5-HTTLPR LL/LS vs. SS genotype carriers (adjusted means and standard deviations)^a

	5-HTTLPR and IGT Net Score				5-HTTLPR and IGT Total Money
	Total sample		High-risk		Total sample		High-risk
Variable	M (SD)	p	M (SD)	p	M (SD)	p	M (SD)	p
LL and LS	51.78 (1.24)	0.45	50.77 (1.63)	0.52	-231.40 (173.48)	0.35	-255.06 (225.51)	0.14
SS	46.89 (2.14)		45.72 (2.34)		-970.79 (303.69)		-1,217.39 (325.73)

^aMeans are adjusted for multiple siblings in the family.