. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Addict Behav. 2013 Sep 13;39(1):10.1016/j.addbeh.2013.09.008. doi: 10.1016/j.addbeh.2013.09.008

Table 1.

Comparison of participant characteristics by condition

	Beer with Caffeine	Beer Alone
	M (SD) or %	M (SD) or %
Age	22.8 (2.3)	23.3 (2.1)
Male (%)	41.4	58.3
White (%)	78.6	83.3
Alcohol Daily Volume	1.49 (1.05)	1.79 (1.05)
Peak BrAC (g%)	0.12 (0.01)	0.12 (0.01)
Enrolled in university	96	83

Note: Alcohol Daily Volume is a product of average daily quantity and weighted frequency ratings, with higher numbers reflecting more drinking. All p values > .20.

BrAC = breath alcohol concentration. g% is also known as g/dL. N = 28 for beer with caffeine, n = 36 for beer without caffeine condition.