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. Author manuscript; available in PMC: 2019 Jul 19.
Published in final edited form as: Soc Sci Res. 2015 Jan 21;52:193–207. doi: 10.1016/j.ssresearch.2015.01.002

Table 5.

Full models of average effects, step-up effects and initiation effects for binge drinking and drinking in the 1st fall semester in college using ROOM

Binge drinking monthly episodes
1st fall semester in college		 Drinking monthly episodes
1st fall semester in college
Predictors Main
effect		 Step-up
effect		 Initiation
effect		 Main
effect		 Step-up
effect		 Initiation
effect
Alcohol use in high school
Roommate drank 0.42** 0.66***
Self drank 3.79*** 3.82***
 Self drank/roommate non-drank -- --
 Both drank 1.08*** 0.96***
 Self non-drank/roommate drank −3.38*** −3.16***
 Neither drank −3.36*** −3.35***
 Neither drank -- --
 Self non-drank/roommate drank −0.02 0.16
 Self drank/roommate non-drank 3.36*** 3.36***
 Both drank 4.43*** 4.35***
Controls
Male 0.58*** 0.58*** 0.58*** 0.95*** 0.95*** 0.95***
Average alcohol use dorm building 0.46 0.48 0.48 1.14** 1.15** 1.15**
Race/ethnicity White (ego) -- -- -- -- -- --
 Asian −0.81** −0.82** −0.82** −1.08** −1.01** −1.01**
 Hispanic 0.08 0.04 0.04 0.39 0.40 0.40
 Black −0.61* −0.63* −0.63* −1.61*** −1.57*** −1.57***
 Other −0.37 −0.41 −0.32 −0.48 −0.49 −0.49
GPA (ego) −0.43** −0.44** −0.44** −0.59** −0.55** −0.55**
Family income (ego) 0.13** 0.12* 0.12* 0.19** 0.18** 0.18**
Mother’s education (ego) 0.004 0.02 0.02 0.03 0.04 0.04
Father’s education (ego) 0.015 0.01 0.01 0.09 0.09 0.09
Race/ethnicity White (roommate) -- -- -- -- -- --
 Asian 0.31 0.31 0.31 0.12 0.10 0.10
 Hispanic −0.09 −0.13 −0.13 −0.09 −0.09 −0.09
 Black −0.03 −0.04 −0.04 −0.14 −0.10 −0.10
 Other 0.09 0.05 0.05 −0.06 −0.04 −0.04
GPA (roommate) 0.018 0.01 0.01 0.16 0.20 0.20
Family income (roommate) 0.10* 0.10* 0.10* 0.06 0.05 0.05
Mother’s education (roommate) −0.03 −0.03 −0.03 0.003 −0.04 −0.04
Father’s education (roommate) −0.06 −0.06 −0.06 −0.05 0.01 0.01
Fixed effects
 Segregated co-ed 0.09 −0.01 −0.01 −0.35 −0.36 −0.34
 South campus 0.36 0.38 0.38 0.59* 0.60* 0.61*
 Smoker in housing form −1.95 −1.96 −1.96 5.95* 6.03* 6.03*
 Smoker * south campus 4.18 4.38 4.38 5.23 5.25 5.25
 Smoker * Segregated co-ed −1.68 −2.02 −2.02 −8.41* −8.58* −8.58*
Random Parameters
 Between variance V(νij) 0.60* 0.55# 0.55# 2.16*** 2.14*** 2.14***
Within variance, V(eijk ) 10.2*** 10.2*** 10.2*** 15.4*** 15.4*** 15.4***
Within-room correlation 0.06 0.05 0.05 0.12 0.12 0.12
N 2,067 2,067 2,067 1,989 1,989 1,989
***

= p-value<.001;

**

= p-value<.01;

*

= p-value<.05;

#

= p-value<.10.

†:

The main, step-up and initiation effects are bolded for easy reading.