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Table 2 Results of mixed effects regression on substance use outcomes (n = 142)

From: Psycho-education for substance use and antisocial personality disorder: a randomized trial

Dependent variable

 

Coefficient

95 % CI

P-value

ASI Drugs CS

ILC intercept

0.001

−0.026 to 0.046

0.588

 

3 months

0.015

−0.017 to 0.047

0.362

 

9 months

−0.052

−0.086 to−0.019

0.002

 

ILC X 3 months

−0.052

−0.096 to−0.009

0.018

 

ILC X 9 months

−0.004

−0.049 to 0.042

0.872

 

ICC site

0.017

0.000 to 0.361

 
 

ICC Patient

0.335

0.234 to 0.455

 
 

Wald χ 2(8)

93.90

 

0.000

ASI Alcohol CS

ILC intercept

−0.012

−0.077 to 0.052

0.708

 

3 months

−0.041

−0.092 to 0.010

0.134

 

9 months

−0.066

−0.120 to−0.112

0.016

 

ILC X 3 months

0.008

−0.061 to 0.077

0.814

 

ILC X 9 months

0.049

−0.023 to 0.121

0.182

 

ICC Site

0.072

0.016 to 0.272

 
 

ICC Patient

0.506

0.402 to 0.610

 
 

Wald χ 2(8)

16.24

 

0.039

Days abstinent

ILC intercept

−2.300

−6.179 to 1.580

0.245

 

3 months

0.970

−4.027 to 2.088

0.534

 

9 months

2.359

−0.863 to 5.810

0.151

 

ILC X 3 months

4.319

0.183 to 8.456

0.041

 

ILC X 9 months

3.584

−0.751 to 7.919

0.105

 

ICC Site

0.005

0.000 to 1.000

 
 

ICC Patient

0.471

0.369 to 0.576

 
 

Wald χ 2(8)

31.17

 

0.000

  1. All analyses adjusted for site and individual, gender, age, and substitution at baseline
  2. TAU Treatment as usual, ILC Impulsive lifestyle counselling, ASI Addiction Severity Index, CS Composite score, ICC Intraclass correlation