Abstract:
BACKGROUND:There is limited knowledge about how environmental factors affect the course of bipolar disorder (BD). Cannabis has been proposed as a potential risk factor for poorer course of illness, but the role of cannabis use has not been studied in a first treatment BD I sample. METHODS:The present study examines the associations between course of illness in first treatment BD I and continued cannabis use, from baseline to one year follow up. Patients (N = 62) with first treatment DSM-IV BD I were included as part of the Thematically Organized Psychosis study (TOP), and completed interviews and self-report questionnaires at both baseline and follow up. Cannabis use within the last six months at baseline and use between baseline and follow up ("continued use") was recorded. RESULTS:After controlling for confounders, continued cannabis use was significantly associated with elevated mood (YMRS) and inferior global functioning (GAF-F) at follow up. Elevated mood mediated the effect of cannabis use on global functioning. CONCLUSIONS:These results suggest that cannabis use has clinical implications for the early course of BD by increasing mood level. More focus on reducing cannabis use in clinical settings seems to be useful for improving outcome in early phase of the disorder.
journal_name
BMC Psychiatryjournal_title
BMC psychiatryauthors
Kvitland LR,Melle I,Aminoff SR,Demmo C,Lagerberg TV,Andreassen OA,Ringen PAdoi
10.1186/s12888-015-0389-xsubject
Has Abstractpub_date
2015-02-05 00:00:00pages
11issn
1471-244Xpii
s12888-015-0389-xjournal_volume
15pub_type
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