DNA methylation patterns in alcoholics and family controls

Table 1 Selected demographic and alcohol-use features at baseline

	Alcohol-dependent siblings (n = 25)	Non-alcoholic siblings (n = 22)
Age (yr) (SD, range)	40.7 (9.5, 24-54)	40.6 (11.4, 21-59)
Gender (M:F)	18:7	4:18
Current smoker	14	7
Race: EA, AA, NA	14, 10, 1	13, 8, 1
Hispanic Ethnicity	2	3
Past 12-mo drinking (mean ± SD)
Drinking days per week	3.91 ± 1.95b	0.95 ± 1.18
Drinks per drinking day	7.90 ± 4.01b	2.68 ± 1.34
Drinks per week	34.0 ± 30.8b	2.7 ± 3.6
1Heavy drinking days per week	2.53 ± 2.66b	0.18 ± 0.34

¹“Heavy drinking days” were defined as days in which men consumed more than 10 drinks and women more than 8 drinks.

^bt-test P < 0.001 vs non-alcoholic siblings. EA: European American; AA: African American; NA: Native American.