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Combining Laser Capture Microdissection and Microfluidic qPCR to Analyze Transcriptional Profiles of Single Cells: A Systems Biology Approach to Opioid Dependence
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Opioid dependence latent structure: two classes with differing severity?

Fiona L Shand1, Tim Slade, Louisa Degenhardt

  • 1National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW, Australia. fionas@unsw.edu.au

Addiction (Abingdon, England)
|December 8, 2010
PubMed
Summary
This summary is machine-generated.

This study identified two distinct classes of opioid dependence in individuals seeking treatment. One class showed higher severity, increased risk of other drug dependence, antisocial personality disorder, and opioid overdose.

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Area of Science:

  • Addiction research
  • Clinical psychology
  • Psychiatry

Background:

  • Opioid abuse and dependence represent a significant public health challenge.
  • Understanding the heterogeneity within opioid-dependent populations is crucial for effective treatment.

Purpose of the Study:

  • To investigate the structural patterns of illicit opioid abuse and dependence.
  • To explore the relationship between these patterns and other clinical variables in a treatment-seeking sample.

Main Methods:

  • A cross-sectional study involving 1511 individuals dependent on opioids, recruited from pharmacotherapy clinics in Sydney, Australia.
  • Data collected via face-to-face interviews covering substance use, psychiatric history, and adverse life events.
  • Latent class and factor mixture models were employed to analyze opioid abuse and dependence criteria.

Main Results:

  • A two-class, one-factor model best described the data, revealing distinct patterns of abuse and dependence criteria endorsement.
  • These classes differed significantly in the odds of other drug dependence, antisocial personality disorder, and non-fatal opioid overdose.
  • Within-class severity correlated with other drug dependence, borderline personality disorder, and opioid overdose.

Conclusions:

  • Two distinct classes of opioid dependence were identified in this clinical sample, differing in externalizing but not internalizing disorders.
  • Findings support the validity of the proposed DSM-V distinction between moderate and severe opioid use disorder.
  • Individuals in the more severe class exhibited higher risks for co-occurring disorders and overdose.