Stages and processes of change among polydrug users in methadone maintenance treatment

Mark A. Belding, Martin Y. Iguchi, R. J. Lamb, Martin Lakin, Robert Terry

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


We applied the stages-of-change model of Prochaska and DiClemente to the problem of drug use among methadone maintenance patients to examine correlates of different stages of treatment readiness. The 276 subjects were divided into stage categories based on self-reported drug use and questionnaire responses regarding plans to discontinue unauthorized drug use in the future. Confirmatory factor analytic procedures validated four process scales derived from a 60-item questionnaire. Each stage was characterized by a profile of change-process scores largely consistent with predictions, though these scores did not distinguish stages as clearly as has been reported in previous research. Analysis of subject characteristics revealed that those in the Precontemplation stage reported significantly longer treatment tenures than subjects in any other stage besides Maintenance.

Original languageEnglish (US)
Pages (from-to)45-53
Number of pages9
JournalDrug and Alcohol Dependence
Issue number1
StatePublished - Jul 1995
Externally publishedYes


  • Heroin
  • Methadone
  • Stages-of-change
  • Treatment readiness

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology
  • Psychiatry and Mental health
  • Pharmacology (medical)


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