Table 1.

Participant Characteristics by Subgroups of User Status: Percentage or Mean (Standard Deviation)

	User Status
Variable	Alcohol-only users (n = 316)	CAM users (n = 63)	SAM users (n = 101)	F
Age	21.88 (1.74)	21.87 (1.85)	21.83 (1.60)	0.03
Percent Women	61.4	58.7	54.5	-
Drinks per week¹	4.71 (6.01)^a	4.84 (7.61)^a	9.83 (11.18)^b	17.82^***
Monthly Income	1036.46 (1030.31)	989.18 (1057.51)	1002.40 (909.00)	0.08
Intensity	5.43 (3.07)^a	5.27 (3.07)^a	6.46 (2.98)^b	4.78^**
O_max	13.98 (8.98)^a	12.56 (8.69)^a	17.35 (10.39)^b	6.66^***
P_max	5.93 (4.45)^a,b	4.54 (4.01)^a	6.26 (4.47)^b	3.28^*
Breakpoint	11.16 (6.12)	10.36 (6.77)	11.38 (5.63)	0.58
Elasticity	.072 (.021)^a,b	.074 (.022)^a	.066 (.020)^b	4.11^*

Note. CAM = Concurrent Alcohol and Marijuana; SAM = Simultaneous Alcohol and Marijuana;

Derived from the Daily Drinking Questionnaire and represent typical drinks per week consumed in the past month; Intensity represents hypothetical alcohol consumption at free cost; O_max represents maximum overall expenditures on alcohol; P_max represents maximum inelastic price; Breakpoint represents price per drink at which consumption ceases; Elasticity represents rate of consumption reduction as a function of price with greater values indicating greater sensitivity to increases in price. F values come from ANOVAs examining group differences on continuous variables without controlling for covariates. Post-hoc analyses indicate significant subgroup differences among subgroups that do not share superscript values.

p < .05

^**

p < .01

^***

p < .001