Table 2.

Interest and readiness to change variables among college student drinkers and college students who drink alcohol and use cannabis

	ALCOHOL-ONLY GROUP (n = 155)		CO-USE GROUP (n = 275)				Between-Group Comparisons (A) v. (B)	Within-Group Comparisons (B) v. (C)
	(A) alcohola		(B) alcohola,b		(C) cannabisa		Chi-square (df = 1)	McNemar’s Chi-square (df = 1)
Interest in Changing Use	n	%	n	%	n	%
If wanted to change my use, I’d be open to (select all that apply):
Strategies to help cut down	113	73%	212	77%	147	53%	0.94	45.43 ***
Strategies to stop using all together	33	21%	41	15%	73	27%	2.83	17.07 ***
Another option	3	2%	8	3%	7	3%	0.38	0.91
None of these	19	12%	24	9%	95	35%	1.37	57.94 ***
Readiness to Change Usec	M	SD	M	SD	M	SD	independent t (df = 426)	paired t (df = 270)
Readiness to Change Sum Score	14.69	7.20	16.41	8.01	16.97	9.65	−2.24 *	−0.82

Note.

^*p < 0.05

^**p < 0.01

^***p < 0.001.

^aValues represent responses to alcohol-specific items and/or intervention options (i.e., (A), (B)), and cannabis-specific items/intervention options (C).

^bComparisons between (B) and (C) use cases in which co-use participants have a value for alcohol and cannabis interventions. Therefore the Ns in column (B) may be slightly different in the McNemar comparisons if participants had any missing ratings. These differences are very slight, and if present, the percentages change 1% or less.

^cReadiness to Change (RCQ) sum score calculated if 10+ of 12 items were completed. All items scaled 0 to 4.