title: Latent class analysis of DSM-5 criteria for opioid use disorders: results from the Iranian National Survey on Mental Health.
abstract: BACKGROUND
  Assessments of DSM-IV and DSM-5 criteria with sample populations of opioid users are limited. This study aimed to determine the number of latent classes in opioid users and assessment of the proposed revisions to the DSM-5 opioid use disorder (OUD) criteria.
  
  
  METHODS
  Data came from the 2011 Iranian National Mental Health Survey (IranMHS) on 7,886 participants aged 15-64 years living in Iran. We used the Composite International Diagnostic Interview (CIDI) version 2.1 in all respondents who indicated using opioids at least 5 times in the previous 12 months (n = 236).
  
  
  RESULTS
  A three-class model provided the best fit of all the models tested. Classes showed a spectrum of severity that was compatible with the DSM-5 classification. 'Legal problems' and 'desire to cut down' showed poor discrimination between classes. The weighted prevalence of OUD using DSM-5 was 20.7% higher than with DSM-IV.
  
  
  CONCLUSIONS
  RESULTS support the grouping based on severity of symptoms, combining abuse and dependence into a single diagnosis, omitting legal problems, and addition of craving as a new criterion.
authors: Department of Epidemiology and Biostatistics, School of Public Health, Lorestan University of Medical Sciences, Khorramabad, Iran.
authors: Mohammad Javad
authors: MJ
authors: Tarrahi
authors: Afarin
authors: A
authors: Rahimi-Movaghar
authors: Hojjat
authors: H
authors: Zeraati
authors: Seyed Abbas
authors: SA
authors: Motevalian
authors: Masoumeh
authors: M
authors: Amin-Esmaeili
authors: Ahmad
authors: A
authors: Hajebi
authors: Vandad
authors: V
authors: Sharifi
authors: Reza
authors: R
authors: Radgoodarzi
authors: Mitra
authors: M
authors: Hefazi
authors: Akbar
authors: A
authors: Fotouhi
mesh_terms: D000293:Adolescent; D000328:Adult; D066249:Craving; D003430:Cross-Sectional Studies; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D009042:Motivation; D009293:Opioid-Related Disorders / Q000145:classification / Q000175:diagnosis*; D055815:Young Adult