Table 1 Characteristics of participants and the mean value (safety set)

		DA-5521 group	Placebo group	Sum	p-value
		N = 11	N = 11	N = 22
Sex Number (%)	Male	11 (100.00)	11 (100.00)	22 (100.00)	-
	Female	0 (0.00)	0 (0.00)	0 (0.00)
Age (year)	Mean±	24.09±1.04	24.55±0.69	24.32±0.89	0.3090&
	Min, Max	22.00, 25.00	23.00, 25.00	22.00, 25.00
Occupation Number (%)	Office	1 (9.09)	0 (0.00)	1 (4.55)	0.2621‡
	Profession	1 (9.09)	0 (0.00)	1 (4.55)
	Student	8 (72.73)	6 (54.55)	14 (63.64)
	Inoccupation	1 (9.09)	4 (36.36)	5 (22.73)
	Etc	0 (0.00)	1 (9.09)	1 (4.55)
Exercise Number (%)	No	1 (9.09)	1 (9.09)	2 (9.09)	0.7249‡
	1-2 times/week	2 (18.18)	5 (45.45)	7 (31.82)
	3-4 times/week	5 (45.45)	4 (36.36)	9 (40.91)
	5-6 times/week	2 (18.18)	1 (9.09)	3 (13.64)
	Everyday	1 (9.09)	0 (0.00)	1 (4.55)
Average Drinking (per week)	Mean±	6.93±3.61	8.77±7.64	7.85±5.91	0.8671&
	Min, Max	4.00, 16.00	2.80, 28.30	2.80, 28.30

p-value for the Wilcoxon rank-sum test
p-value for Fisher’s exact test
Values are expressed as the mean±standard deviation.