Monitoring patterns of substance use in drug-dependent patients

Luis San, Marta Torrens, Jordi Tato, Claudio Castillo, Rafael De La Torre, Belén Arranz

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)


Drug-addicted patients (N = 435) admitted for treatment in different clinical settings were studied. Patients were classified according to their self-report of consumed drugs and to the results of urine screening tests. Of the patients, 77.8% were active consumers, 9.6% were included in a methadone maintenance program, and 12.6% were abstinent. In the active consumer patients, positive urine screening results surpassed by far the information provided in the self-reports. Most patients tested positive to several drugs, while only 8. 7% tested negative to all screened drugs. These results indicate that the information provided by drug-dependent patients lacks reliability when an analytical screening method is used simultaneously.
Original languageEnglish
Pages (from-to)425-430
JournalJournal of Substance Abuse Treatment
Issue number5
Publication statusPublished - 1 Sep 1998


  • Drug-addicted patients
  • Self-report
  • Urine screening


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