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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: Psychol Addict Behav. 2017 Sep 28;31(7):751–762. doi: 10.1037/adb0000317

Table 1.

Baseline Characteristics of Study Sample

Variable MI
(N = 47)
SOMI
(N = 46)
NTC
(N = 46)
Overall Sample
(N = 139)
M or % SD M or % SD M or % SD M or % SD
Demographics
Age (years) 43.7 11.09 43.39 13.53 43.0 13.34 43.4 12.6
Male 44.7 41.3 43.5 43.2
Race/Ethnicity
 Non-Hispanic, White/Caucasian 66.0 71.7 69.6 69.0
 Hispanic/Latino, any race 23.4 13.0 15.2 17.3
 Other 10.6 15.3 15.2 13.7
Education
 High school diploma/GED and under 10.6 8.7 2.2 7.2
 Some college/Associates 23.4 19.6 26.1 23.0
 Bachelor’s degree 36.2 47.8 26.1 36.7
 Some graduate school or higher 29.8 23.9 45.7 33.1
Employment
 Employed 91.5 63.0 78.3 77.7
 Unemployed/Looking for work 2.1 15.2 10.9 9.4
 Not in labor force/not looking for work 6.4 21.7 10.9 13.0
Drinking Severity
 Mean sum of standard drinks per week 30.6 11.5 31.3 15.0 31.3 16.1 31.1 14.2
 Mean drinks per drinking day 6.3 2.8 5.9 2.3 6.2 2.6 6.1 2.6
 Short Inventory of Problems (SIP) 13.5 8.7 12.4 8.0 13.5 5.9 13.1 7.6
 Alcohol Dependence Scale (ADS) 13.6 5.3 13.5 6.6 14.7 5.5 13.9 5.8
 Number of alcohol dependence criteria met 5.0 1.6 4.7 1.7 5.5 1.6 5.1 1.7
Any drug use 40.4 26.1 28.3 31.7
Beck’s Depression Inventory-II Score (BDI-II) 13.9 9.0 14.7 9.9 12.4 8.3 13.7 9.1
Ever received formal treatment for substance use problem 23.4 39.1 37.0 33.1
Readiness to Change Questionnaire Item Mean* 1.1 .36 .92 .41 1.1 .36 1.1 .38
Average Daily Commitment 5.6 1.6 4.9 1.7 5.2 1.8 5.2 1.8
*

p < .05