Table 2.

Multilevel Models of CAB Use Predicting Daily Alcohol Outcomes

	Number drinks last night ERR (CI)	Number problems last night ERR (CI)	Sex after drinking OR (CI)	Drove after drinking OR (CI)
Intercept	3.84 (3.42–4.30)***	1.17 (0.91–1.50)	0.13 (0.08–0.20)***	0.09 (0.06–0.14)***
Level 1: Daily level
CAB use last night	1.37 (1.20–1.57)***	1.43 (1.13–1.82)**	0.79 (0.36–1.75)	0.99 (0.47–2.07)
Number drinks last night	--	1.13 (1.05–1.22)**	1.22 (1.07–1.40)**	1.05 (0.92–1.20)
Level 2: Person level
Impulsivity	1.00 (1.00–1.01)	1.02 (1.00–1.04)*	1.01 (0.97–1.04)	1.02 (0.97–1.06)

Note. Separate models were conducted for each outcome. CAB = caffeinated alcoholic beverage as measured by 0 = did not drink CABs during the previous night’s drinking episode and 1 = used at least one CAB the previous night. OR = odds ratio from Bernoulli multilevel modeling distribution. ERR = event rate ratio from Poisson distribution. CI = confidence interval.

^***p< .001.

^**p< .01.

^*p< .05.