TABLE 3.

Summary of hierarchical multiple regression analysis predicting CAB use frequency

Step	Predictor	B	β	SE (B)	R 2	Δ R 2
CEOA entered prior to CEQ
Step 1	Gender	−.18	−.09	.14	.003b
Step 2	Alcohol use	.02*	.17	.01	.026	.027*
Step 3	CEOA				.077	.081*
	Sociability	.02	.11	.02
	Tension reduction	−.03	−.07	.03
	Liquid courage	−.02	−.10	.04
	Sexuality	−.01	−.02	.03
	Impairmenta	−.04*	−.22	.02
	Risk and aggression	.06	.23	.04
	Self-perception	.10*	.27	.03
Step 4	CEQ				.104	.042
	Positive effects	.00	.01	.01
	Acute negative effects	−.01	−.04	.01
	Mood effects	−.02	−.11	.02
	Withdrawal symptoms	.03	.26	.01
CEQ entered prior to CEOA
Step 1	Gender	−.18	−.09	.14	.003
Step 2	Alcohol use	.02*	.17	.01	.026	.027*
Step 3	CEQ				.048	.040
	Positive effects	−.00	−.02	.01
	Acute negative effects	.00	.00	.01
	Mood effects	−.00	−.01	.02
	Withdrawal symptoms	.03*	.21	.01
Step 4	CEOA				.104	.083*
	Sociability	.03	.16	.02
	Tension reduction	−.04	−.09	.04
	Liquid courage	−.02	−.07	.04
	Sexuality	−.01	−.02	.03
	Impairmenta	−.05*	−.27	.02
	Risk and aggression	.05	.21	.04
	Self-perception	.10*	.28	.03

Note. Gender: 1 = male, 2 = female; CEOA, comprehensive effects of alcohol; CEQ, caffeine expectancy questionnaire; CAB, caffeinated alcoholic beverage.

^*Significant at p < .025 (.05/2) following Bonferroni correction.

^aImpairment = Cognitive and Behavioral Impairment.

^bThe R² reported is the adjusted R².