The Construct and Predictive Validity of Different Approaches to Combining Urine and Self-Reported Drug Use Measures among Older Adolescents after Substance Abuse Treatment

Reconciling urine results and self-reports is a classic challenge in substance abuse treatment research in general. For adolescents, the problems are compounded by the facts that they are more likely to use marijuana (which takes longer to metabolize) and to be coerced into treatment (which may incr...

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Bibliographic Details
Published in:The American journal on addictions 2006-01, Vol.15 (S1), p.s92-s101
Main Authors: Lennox, Richard, Dennis, Michael L., Ives, Melissa, White, Michelle K.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Biomarkers - urine
Cannabinoids - urine
Female
Humans
Male
Marijuana Abuse - rehabilitation
Marijuana Abuse - urine
Multicenter Studies as Topic
Randomized Controlled Trials as Topic
Reproducibility of Results
Self Disclosure
Street Drugs - urine
Substance Abuse Detection - standards
Substance-Related Disorders - rehabilitation
Substance-Related Disorders - urine
United States
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Summary:Reconciling urine results and self-reports is a classic challenge in substance abuse treatment research in general. For adolescents, the problems are compounded by the facts that they are more likely to use marijuana (which takes longer to metabolize) and to be coerced into treatment (which may increase lying). This article examines the construct and predictive validity of several different approaches for combining urine and self reported drug use including using common individual measures (urine tests and self-reported recency, frequency, and peak use), taking either as positive, using a summary scale, and using a latent model. Data are from 819 older adolescents 24 to 42 months after intake in seven sites. Days of use, the GAIN's substance frequency scale, and a latent model were the three best methods in terms of construct and predictive validity. Implications for treatment and longitudinal evaluation will be discussed. (Am J Addict 2006;15:92-101)
ISSN:1055-0496
1521-0391
DOI:10.1080/10550490601006089