Delay discounting, impulsiveness, and addiction severity in opioid-dependent patients

Elias Robles-Sotelo, B. Emma Huang, Pippa M. Simpson, Donald E. McMillan

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

Individuals who abuse drugs show higher delay discounting (DD) rate and impulsiveness scores compared with controls; however, it is unclear if DD rate covaries with severity of the addiction or if an individual's discounting rate can be changed by effective substance abuse treatment. This study compared methadone maintenance treatment (MMT) patients (n = 30) who had not used illegal drugs for 2 years with drug-using MMT patients (n = 30) and controls (n = 25) in terms of addiction severity, DD rate, and impulsiveness. Methadone patients abstinent from illegal drugs scored significantly lower on a number of addiction severity measures than the drug-using methadone patients. In addition, both groups of MMT patients showed significantly higher rates of DD and impulsiveness than the control group; however, no differences in DD rate or impulsiveness were found between the groups of patients. Results suggest that DD rate and impulsiveness may not covary with indicators of addiction severity in MMT patients.

Original languageEnglish (US)
Pages (from-to)354-362
Number of pages9
JournalJournal of Substance Abuse Treatment
Volume41
Issue number4
DOIs
StatePublished - Dec 2011

Keywords

  • Addiction severity
  • Delay discounting
  • Impulsiveness
  • Methadone maintenance
  • Opioids

ASJC Scopus subject areas

  • Phychiatric Mental Health
  • Medicine (miscellaneous)
  • Clinical Psychology
  • Psychiatry and Mental health

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