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The natural course of cannabis use, abuse and dependence over four years : a longi-tudinal community study of adolescents and young adults

von Sydow, K. and Lieb, R. and Pfister, H. and Höfler, M. and Sonntag, H. and Wittchen, H.-U.. (2001) The natural course of cannabis use, abuse and dependence over four years : a longi-tudinal community study of adolescents and young adults. Drug and alcohol dependence, Vol. 64, H. 3. pp. 347-361.

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Official URL: http://edoc.unibas.ch/dok/A5253545

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Abstract

Objectives: To determine incidence and patterns of natural course of cannabis use and disorders as well as cohort effects in a community sample of adolescents and young adults. Method: Cumulative incidence and patterns of cannabis use and disorders were examined in a prospective longitudinal design (mean follow-up period = 42 months) in a representative sample (N = 2446) aged 14-24 years at the outset of the study. Patterns of cannabis use, abuse and dependence (DSM-IV) were assessed with the Composite International Diagnostic Interview (M-CIDI). Results: (1) Cumulative lifetime incidence for cannabis use (at second follow-up): 47%; 5.5% for cannabis abuse, 2.2% for dependence. (2) Men used and abused cannabis more often than women. (3) The majority of the older participants (18-24 years at baseline) had reduced their cannabis use at follow-up, while younger participants (14-17 years at baseline) more often had increased their use and developed abuse or dependence. (4) The younger birth cohort (1977-1981) tended to start earlier with substance (ab)use compared to the older birth cohort (1970-1977). (5) Cannabis use was associated with increasing rates of concomitant use of other licit and illicit drugs. Conclusions: Cannabis use is widespread in our sample, but the probability of developing cannabis abuse or dependence is relatively low (8%). The natural course of cannabis use is quite variable: about half of all cannabis users stopped their use spontaneously in their twenties, others report occasional or more frequent use of cannabis.
Faculties and Departments:07 Faculty of Psychology > Departement Psychologie > Forschungsbereich Klinische Psychologie und Neurowissenschaften > Klinische Psychologie und Epidemiologie (Lieb)
UniBasel Contributors:Lieb, Roselind
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0376-8716
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:24
Deposited On:22 Mar 2012 13:42

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