title: Concordance between verbal report and urine screen of recent marijuana use in adolescents.
abstract: This study compared the concordance of self-report for recent marijuana use with results obtained from urine drug screen. The sample consisted of adolescent sons of fathers with DSM-III-R lifetime substance use disorder (SUD) [high average risk (HAR); N= 75] and sons of fathers with no Axis 1 psychiatric or SUD [low average risk (LAR); N= 125]. To avoid recall bias, and to ensure that the timeframe for accurate detection was restricted to promote accuracy, urine drug screen results were compared to self-reported marijuana use during the prior 48 h using an interview format. The HAR group of adolescents reported a higher rate of recent cannabis use and also had a higher rate of cannabis detection as measured in urine. The two groups did not differ with respect to either over or under-reporting marijuana use. Overall, of 19 participants who obtained positive urine cannabis results, six (31.5%) verbally denied that they used marijuana within the previous 2 days. Among the 181 participants who obtained a negative urine drug screen, 20 subjects (11.5%) inaccurately asserted that they had used marijuana within the prior 2 days. In total, 13% of the participants (26/200) inaccurately reported recent cannabis use. These results underscore the need for caution in interpreting the results of self-report methods documenting the prevalence of drug use among youth.
authors.affiliation: Center for Education and Drug Abuse Research, School of Pharmacy, University of Pittsburgh, PA 15261, USA.
authors.forename: I H
authors.initials: IH
authors.lastname: Akinci
authors.forename: R E
authors.initials: RE
authors.lastname: Tarter
authors.forename: L
authors.initials: L
authors.lastname: Kirisci
mesh_terms: D000293:Adolescent; D013759:Dronabinol / Q000652:urine*; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000652:urine*; D012650:Self Disclosure
chemical_list: D013759:Dronabinol