Age when ADHD diagnose was attained | |
 0–12 | 16.3% |
 13–19 | 12.1% |
  ≥ 20 | 69.2% |
 Unknown | 2.4% |
 ≥ 1 biological parent with SUD | |
 Yes | 44.8% |
 No | 44.6% |
 Unknown | 10.5% |
Moderate to severe SUD: | |
 Alcohol | 54.2% |
 Cannabis | 33.2% |
 Hallucinogens | 2.4% |
 Inhalants | 3.1% |
 Opioids | 14.5% |
 Stimulants | 43.6% |
 Sedatives/hypnotics/anxiolytics | 9.4% |
 Tobacco | 63.5% |
Multiple SUDs (tobacco not included) | |
  ≥ 2 co-current SUDs (moderate to severe) | 46.9% |
  ≥ 3 co-current SUDs (moderate to severe) | 14.0% |
Psychiatric co-morbidity (other than ADHD/SUD) | |
 Yes | 61.4% |
 No | 36.0% |
 Unknown | 2.6% |
 Antisocial personality disorder | 2.2% |
 Anxiety disorders | 5.5% |
 Autism spectrum disorder | 6.1% |
 Bipolar and related disorders | 4.3% |
 Borderline personality disorder | 10.2% |
 Depressive disorders | 31.5% |
 Disruptive, impulse-control, and conduct disorders | 2.4% |
 Dissociative disorders | 0.5% |
 Feeding and eating disorders | 1.7% |
 Intellectual disability | 2.2% |
 Motor disorder (e.g., Tourette's) | 0.7% |
 Obsessive–compulsive and related disorders | 2.1% |
 Schizophrenia spectrum and other psychotic disorders | 1.7% |
 Somatic symptom and related disorders | 1.2% |
 Trauma- and stressor-related disorders (e.g., PTSD) | 12.1% |