There are multiple definitions:

1. substance use disorder(English)

   • ADHD, MTA, SUDT, FEP, GAD-SUD, COD, FMHS, OSU
   • Addiction and health, Public Health, Psychiatry
   • https://doi.org…sat.2022.108899
   • https://doi.org….1038/srep12038

2. subjective unit of distress(English)

   • there are clinically significant effects of the EMDR procedure that appear to be independent of the nature of the kinesthetic stimulation used. However, alternating stimulation may confer an additional benefit
   • EMDR, PTSD
   • Psychology, Therapeutic approaches, Post-traumatic state
   • https://doi.org….1159/000093950

3. sudden unexplained death(English)

   • LQTS, JLNS, SCA, SCD, TEST, VUS
   • Electrophysiology, Cardiology, Genetics, Screening
   • https://doi.org…acc.2022.11.036

4. substance use diagnosis(English)

   • level of PTSD symptomatology, particularly avoidance symptoms, may be important targets for smoking cessation treatment among male smokers who have experienced a traumatic event
   • PTSD
   • Addiction and health, Diagnostics
   • https://doi.org…beh.2008.03.004

5. smartphone use disorder(English)

   • FoMO, IUD
   • Addiction and health, Social media
   • https://doi.org…psyg.2018.00398