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Table 1 Family background, education, and work experience in the two groups in compulsory care due to substance abuse: ADHD/SUD group and the general SUD group without known ADHD

From: Attention deficit/hyperactivity disorders with co-existing substance use disorder is characterized by early antisocial behaviour and poor cognitive skills

  ADHD/SUD General SUD    
n = 60 n = 120 χ2 p Φ
Family background      
Parents separated before 7 years old 16 (26.7) 12 (10.0%) 7.77 .10 .21
Parents separated between ages 7 and 18 12 (20%) 23 (19.2%)
Single parent 11 (18.3) 21 (17.5%)
Other custodian than biological parents 4 (6.7) 7 (5.8%)
Both parents 17 (28.3%) 46 (38.3%)
Missing data 0 11 (9.2%)
Psychiatric disorder and/or abuse in parents    
Psychiatric disorder and/ or abuse in parents 32 (53.4%) 68 (56.7%) 0.35 .85 .01
No psychiatric disorder and/or abuse in parents 26 (43.3%) 52 (43.3%)
Missing data 2 (3.3%) 0
Educational level      
Less than 9 years 12 (20.0%) 23 (19.2%) 2.35 .50 .11
Nine years 34 (56.7%) 58 (48.3%)
Secondary school/ vocational education 14 (23.3%) 37 (30.8%)
University/high school 0 2 (1.7%)
Work experience      
Work experience ≤ 6 months 26 (43.3%) 40 (33.3%) 2.7 0.10 .12
Work experience > 6 months 30 (50.0%) 79 (65.9%)
Missing data 4 (6.7%) 1 (0.8%)