Table 4.

Heritability of Level of Response

	All Participants				African American Participants
	h2r	SEa	p	95% CIb	h2r	SEa	p	95% CIb
SREDc	0.13	0.31	0.339	(−0.48, 0.74)	0.44	0.33	0.095	(−0.21, 1.09)
SRRDc,d	0.52	0.33	0.068	(−0.13, 1.17)	-	-	-	-
SRHDc	0.19	0.39	0.318	(−0.57, 0.95)	0.22	0.30	0.238	(−0.37, 0.81)
SRTT	0.67	0.31	0.025	(0.06, 1.28)	0.70	0.37	0.045	(−0.03, 1.43)

SRED: Early drinking period SRE score; SRRD: Regular drinking period SRE score; SRHD: Heavy drinking period SRE score; SRTT: Total SRE score

^aStandard Error

^bConfidence Interval

^cLog transformed for African American subset

^dSRRD was not determined for the African American subset in this analysis