The Severity of Dependence Scale (SDS) in an adolescent population of cannabis users

Reliability, validity and diagnostic cut-off

Greg Martin*, Jan Copeland, Peter Gates, Stuart Gilmour

*Corresponding author for this work

Research output: Contribution to journalArticle

128 Citations (Scopus)

Abstract

The Severity of Dependence Scale (SDS) is a five-item scale that has been reported to be a reliable and valid screening instrument for dependence and a measure of dependence severity in adults across several substance classes. To date no data have been reported on its performance in a population of adolescent cannabis users. The current study assessed the psychometric properties of the SDS in a community sample of 14-18-year-old adolescent cannabis users (n = 100). Internal consistency (α = 0.83) and test-retest coefficients (ICC = 0.88) were high and a principal components analysis of the scale found all items to load on a single factor. Total SDS score correlated significantly with frequency of cannabis use and number of DSM-IV dependence criteria met, indicating good concurrent validity. Receiver Operating Characteristic curve analysis was used to determine the most appropriate SDS cut-off score for use as an indicator of cannabis dependence, with optimal discrimination at an SDS score of 4. These findings indicate that the SDS is a reliable and valid measure of severity of cannabis dependence among adolescents, has high diagnostic utility, and that an SDS score of 4 may be indicative of cannabis dependence.

Original languageEnglish
Pages (from-to)90-93
Number of pages4
JournalDrug and Alcohol Dependence
Volume83
Issue number1
DOIs
Publication statusPublished - 9 Jun 2006
Externally publishedYes

Keywords

  • Adolescents
  • Cannabis
  • Dependence
  • Psychometrics

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