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Cannabis use and age at onset of symptoms in subjects at clinical high risk for psychosis
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Dragt, S., Nieman, D. H., Schultze-Lutter, F., van der Meer, F., Becker, H., de Haan, L., Dingemans, P. M., Birchwood, M. J., Patterson, Paul, Salokangas, R. K. R., Heinimaa, M., Heinz, A., Juckel, G., Graf von Reventlow, H., French, P., Stevens, H., Ruhrmann, S., Klosterkötter, J. and Linszen, D. H. (2012) Cannabis use and age at onset of symptoms in subjects at clinical high risk for psychosis. Acta Psychiatrica Scandinavica, 125 (1). pp. 45-53. doi:10.1111/j.1600-0447.2011.01763.x ISSN 0001-690X.
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Official URL: http://dx.doi.org/10.1111/j.1600-0447.2011.01763.x
Abstract
Objective: Numerous studies have found a robust association between cannabis use and the onset of psychosis. Nevertheless, the relationship between cannabis use and the onset of early (or, in retrospect, prodromal) symptoms of psychosis remains unclear. The study focused on investigating the relationship between cannabis use and early and high-risk symptoms in subjects at clinical high risk for psychosis.
Method: Prospective multicenter, naturalistic field study with an 18-month follow-up period in 245 help-seeking individuals clinically at high risk. The Composite International Diagnostic Interview was used to assess their cannabis use. Age at onset of high risk or certain early symptoms was assessed retrospectively with the Interview for the Retrospective Assessment of the Onset of Schizophrenia.
Results: Younger age at onset of cannabis use or a cannabis use disorder was significantly related to younger age at onset of six symptoms (0.33 < rs < 0.83, 0.004 < P < 0.001). Onset of cannabis use preceded symptoms in most participants.
Conclusion: Our results provide support that cannabis use plays an important role in the development of psychosis in vulnerable individuals. Cannabis use in early adolescence should be discouraged.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Health Sciences > Mental Health and Wellbeing Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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| Journal or Publication Title: | Acta Psychiatrica Scandinavica | ||||
| Publisher: | Wiley-Blackwell Publishing, Inc. | ||||
| ISSN: | 0001-690X | ||||
| Official Date: | 2012 | ||||
| Dates: |
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| Volume: | 125 | ||||
| Number: | 1 | ||||
| Page Range: | pp. 45-53 | ||||
| DOI: | 10.1111/j.1600-0447.2011.01763.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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