. Author manuscript; available in PMC: 2018 May 1.

Published in final edited form as: Psychol Addict Behav. 2017 Feb 9;31(3):307–314. doi: 10.1037/adb0000260

Table 4.

Fixed and Random Effects of Multilevel Model Comparing Different Substance Use Combinations to Alcohol Only Use on Consequences Experienced

Fixed Effects	Estimate (S.E.)
Intercept	2.96 (0.11)^**
Level 1
Substance use Combination (Predictor)
Alcohol Only	Ref
Alcohol + Nicotine	0.39 (0.19)^*
Alcohol +Marijuana	0.34 (0.17)^*
Alcohol +ADHD Medication	1.07 (0.53)^*
Alcohol +Cocaine	1.86 (0.82)^*
Drinks Consumed (Covariate)	0.38 (0.02)^**
Day of Diary Report (Covariate)	−0.61 (0.07)
Substance Use Combination^* Day of Diary Report (Covariate)
Alcohol Only^* Day of Diary Report	Ref
Alcohol + Nicotine^* Day of Diary Report	0.10 (0.20)
Alcohol +Marijuana^* Day of Diary Report	−0.08 (0.18)
Alcohol +ADHD Medication^* Day of Diary Report	1.66 (0.55)^*
Alcohol +Cocaine^* Day of Diary Report	3.04 (1.14)^*
Level 2
Gender (Covariate)	1.52 (0.22)^**
Cross-Level Interactions
Gender^* Drinks Consumed (Covariate)	0.19 (0.03)^**
Gender^* Day of Diary Report (Covariate)	−0.28 (0.13)^*
Drinks Consumed^* Day of Diary Report (Covariate)	−0.10 (0.01)^**

Random Effects

Drinks Consumed
Variance of Intercepts	3.89 (0.35)^**
Variance of Slopes	0.03 (0.01)^**
Covariance (Intercept, Slope)	−0.34 (0.04)^**
Residual	5.52 (0.16)^**

Note:

p < .05,

^**

p < .001