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Table 1 Descriptive statistics of substance use at all assessment waves (means and standard deviations)

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

  TAU ILC
  Baseline (n = 74) 3 months (n = 61) SMD 9 months (n = 55) SMD Baseline (n = 93) 3 months (n = 72) SMD 9 months (n = 63) SMD
ASI drugs CS 0.19 (0.13) 0.21 (0.12) −0.12 0.16 (0.13) 0.27** 0.20 (0.13) 0.17 (0.12) 0.23* 0.15 (0.12) 0.42**
ASI alcohol CS 0.15 (0.22) 0.12 (0.22) 0.14 0.10 (0.18) 0.22* 0.14 (0.22) 0.12 (0.22) 0.22 0.12 (0.21) 0.10
Days Abstinent 11.8 (11.7) 10.8 (11.2) −0.09 13.7 (12.7) 0.17 9.07 (10.9) 13.2 (12.7) 0.38* 15.3 (13.3) 0.58**
Abstinent 12 % 13 %   13 %   3 % 17 %   21 %  
Daily use 36 % 36 %   33 %   42 % 37 %   31 %  
  1. Abstinent indicates zero days of illicit drug or alcohol use out of the past 30. Significant differences in fixed-effects regression: *: p < 0.05. **p < 0.01. Nine participants had not completed data on substance use at baseline
  2. TAU Treatment as usual, ILC Impulsive lifestyle counselling, ASI Addiction Severity Index, CS Composite score, SMD standard mean difference