. Author manuscript; available in PMC: 2016 Jul 1.

Published in final edited form as: Alcohol Clin Exp Res. 2015 May 22;39(7):1193–1202. doi: 10.1111/acer.12737

Table 1.

Sample characteristics and tests of drinking group differences.

	Light Drinkers (N = 110)	Heavy Drinkers (N = 132)	Statistical Test
Age	25.75 (4.04)	25.53 (4.32)	t = 0.41, p = 0.68
Sex (% Male)	65%	62%	Χ² (1) = 0.22, p = 0.64
Ethnicity (% White)	45%	52%	Fisher Exact p = 0.31
Education (years)	14.76 (2.49)	14.61 (2.21)	t = 0.48, p = 0.63
Cigarette Smoking Days (past 60)	20.03 (96.58)	21.53 (26.20)	t = 0.17, p = 0.86
DPDD	3.53 ( 1.61)	6.12 ( 2.80)	t = 8.60, p < 0.001
Drinking Days	16.27 (9.64)	32.89 (11.90)	t = 11.80, p< 0.001
Heavy Drinking Days	3.95 (4.47)	20.36 (11.90)	t = 13.68, p < 0.001
AUDIT	9.10 (4.33)	14.22 (5.04)	t = 8.41, p < 0.001

Note: Ethnicity differences between groups were tested as a 5 level categorical variable and overall distribution of ethnicity was not found to differ between groups; however, for simplicity of presentation, only percent Caucasian is reported.