Table 1.

Participant characteristics. For each group, means ± standard deviations are included for each variable. Group comparisons are expressed as Mann-Whitney U-values or χ² (marked with ¹).

	BD (n = 29)	LD (n = 32)	Statistical Value	p
Age	23.41 ± 3.5	23.41 ± 3.4	460	.954
% Female	51.7%	50%	.015¹	.903
White/Non-Hispanic	65.5%	71.9%	.067¹	.796
Family history of alcoholism	55%	44%	.403¹	.526
Undergraduate GPA	3.13 ± .5	3.44 ± .4	277	< .05
Education years	15.79 ± 2	16 ± 2	416	.483
In the past six months
Binge episodes	14.09 ± 13.6	.09 ± .3	0	< .001
Blackouts	4.66 ± 3.7	.03 ± .2	2.5	< .001
Drinking days/week	3.21 ± 1.3	1.66 ± .8	135.5	< .001
Drinks per occasion	5.52 ± 1.5	1.81 ± .9	18.5	< .001
Drinks consumed per week	17.72 ± 8.6	3.27 ± 2.3	27.5	< .001
Age of first drink	17.25 ± 2.2	18.45 ± 2.1	163.5	< .001
Max. number of drinks in 24 hrs	12.09 ± 5.7	4.73 ± 2.2	32	< .001
No. times felt drunk past month	5.74 ± 4.8	2.00 ± 1.7	157	< .001
Consequences of alcohol (YAACQ)	11.07 ± 5.3	2 ± 1.9	41	< .001
Alcoholism-related symptoms (SMAST)	3.36 ± 3.3	.56 ± .9	202	< .001
Drinking motives (DMQ)	1.99 ± .4	1.64 ± .3	192	< .001
Anxiety (GAD)	4.61 ± 5.4	2.38 ± 3.2	326.5	.065
Depression (PHQ)	4.86 ± 5	2.13 ± 2	322.5	.059
Impulsivity (ABIS)	2.06 ± .5	1.83 ± .3	319	.055
Sensation Seeking (BSSS)	3.75 ± .7	3.39 ± .7	309.5	< .05
EPQ
Neuroticism	3.86 ± 3.52	3.44 ± 3.34	411.5	.585
Psychoticism	2.54 ± 2.12	2.28 ± 1.63	428	.763
Extraversion	9.43 ± 2.43	8.22 ± 3.5	371	.248
NIH Toolbox
Working Memory	0.76 ± 0.10	0.74 ± 0.11	400.5	.353
Dimensional Shift	0.87 ± 0.14	0.92 ± 0.05	349	.097
Processing Speed	0.58 ± 0.07	0.6 ± 0.09	382	.236
Episodic Memory	0.78 ± 0.17	0.8 ± 0.15	395	.550