Cannabis psychosis

examining the evidence for a distinctive psychopathology in a systematic and narrative review.

Alexander Baldacchino, Zoe Hughes, Michael Kehoe, Hannah Blair, Ying Teh, Stacey Windeatt, Ilana B. Crome

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    Background: The term "cannabis psychosis" has become ubiquitous in the psychiatric literature. Few authors have described the precise psychopathology of this potentially distinct subtype of psychosis. Specifically, little attention has been paid to exploring whether cannabis psychosis is characterized by a psychopathology which is different from that of other types of psychosis.
    Objective: The purpose of this paper was to systematically review the literature for evidence of a specific constellation of symptoms which are consistently characteristic of cannabis psychosis within an inpatient psychiatric setting and to determine whether these combine to create a psychopathology which is distinct from that of other types of psychosis.
    Method: Systematic review using Meta-analysis Of Observational Studies in Epidemiology (MOOSE) guidelines.
    Results: 13 studies of the 439 identified met the inclusion criteria. Only eight studies had sufficient internal and external validity to allow comparison in a narrative format of the psychopathology present, compared with controls. Of these eight selected studies, seven reported at least one significant difference (p <.05) in the psychopathology of the cannabis group to the control group used as a comparator.
    Discussion and Conclusion: This study should be interpreted with great caution and conclusions should not be generalized. These findings do not suggest that "cannabis psychosis" does not exist, only that from a psychopathological perspective it may not be qualitatively any different from other forms of psychosis. Future research in this area needs to focus on clarifying the definition or description of "cannabis psychosis" and the use of standardized robust experimental and/or observational designs to eliminate heterogeneity that may lead to inconclusive results.

    Original languageEnglish
    Pages (from-to)S88-S98
    Number of pages11
    JournalThe American Journal on Addictions
    Volume21
    Issue numberSuppl 1
    DOIs
    Publication statusPublished - Nov 2012

    Fingerprint

    Cannabis
    Psychopathology
    Psychotic Disorders
    Psychiatry
    Observational Studies
    Meta-Analysis
    Inpatients
    Epidemiology
    Guidelines
    Control Groups

    Cite this

    Baldacchino, Alexander ; Hughes, Zoe ; Kehoe, Michael ; Blair, Hannah ; Teh, Ying ; Windeatt, Stacey ; Crome, Ilana B. / Cannabis psychosis : examining the evidence for a distinctive psychopathology in a systematic and narrative review. In: The American Journal on Addictions . 2012 ; Vol. 21, No. Suppl 1. pp. S88-S98.
    @article{914382816d3a44b6b247c323466860c1,
    title = "Cannabis psychosis: examining the evidence for a distinctive psychopathology in a systematic and narrative review.",
    abstract = "Background: The term {"}cannabis psychosis{"} has become ubiquitous in the psychiatric literature. Few authors have described the precise psychopathology of this potentially distinct subtype of psychosis. Specifically, little attention has been paid to exploring whether cannabis psychosis is characterized by a psychopathology which is different from that of other types of psychosis. Objective: The purpose of this paper was to systematically review the literature for evidence of a specific constellation of symptoms which are consistently characteristic of cannabis psychosis within an inpatient psychiatric setting and to determine whether these combine to create a psychopathology which is distinct from that of other types of psychosis. Method: Systematic review using Meta-analysis Of Observational Studies in Epidemiology (MOOSE) guidelines. Results: 13 studies of the 439 identified met the inclusion criteria. Only eight studies had sufficient internal and external validity to allow comparison in a narrative format of the psychopathology present, compared with controls. Of these eight selected studies, seven reported at least one significant difference (p <.05) in the psychopathology of the cannabis group to the control group used as a comparator. Discussion and Conclusion: This study should be interpreted with great caution and conclusions should not be generalized. These findings do not suggest that {"}cannabis psychosis{"} does not exist, only that from a psychopathological perspective it may not be qualitatively any different from other forms of psychosis. Future research in this area needs to focus on clarifying the definition or description of {"}cannabis psychosis{"} and the use of standardized robust experimental and/or observational designs to eliminate heterogeneity that may lead to inconclusive results.",
    author = "Alexander Baldacchino and Zoe Hughes and Michael Kehoe and Hannah Blair and Ying Teh and Stacey Windeatt and Crome, {Ilana B.}",
    year = "2012",
    month = "11",
    doi = "10.1111/j.1521-0391.2012.00295.x",
    language = "English",
    volume = "21",
    pages = "S88--S98",
    journal = "The American Journal on Addictions",
    issn = "1055-0496",
    publisher = "Wiley",
    number = "Suppl 1",

    }

    Cannabis psychosis : examining the evidence for a distinctive psychopathology in a systematic and narrative review. / Baldacchino, Alexander; Hughes, Zoe; Kehoe, Michael; Blair, Hannah; Teh, Ying; Windeatt, Stacey; Crome, Ilana B.

    In: The American Journal on Addictions , Vol. 21, No. Suppl 1, 11.2012, p. S88-S98.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Cannabis psychosis

    T2 - examining the evidence for a distinctive psychopathology in a systematic and narrative review.

    AU - Baldacchino, Alexander

    AU - Hughes, Zoe

    AU - Kehoe, Michael

    AU - Blair, Hannah

    AU - Teh, Ying

    AU - Windeatt, Stacey

    AU - Crome, Ilana B.

    PY - 2012/11

    Y1 - 2012/11

    N2 - Background: The term "cannabis psychosis" has become ubiquitous in the psychiatric literature. Few authors have described the precise psychopathology of this potentially distinct subtype of psychosis. Specifically, little attention has been paid to exploring whether cannabis psychosis is characterized by a psychopathology which is different from that of other types of psychosis. Objective: The purpose of this paper was to systematically review the literature for evidence of a specific constellation of symptoms which are consistently characteristic of cannabis psychosis within an inpatient psychiatric setting and to determine whether these combine to create a psychopathology which is distinct from that of other types of psychosis. Method: Systematic review using Meta-analysis Of Observational Studies in Epidemiology (MOOSE) guidelines. Results: 13 studies of the 439 identified met the inclusion criteria. Only eight studies had sufficient internal and external validity to allow comparison in a narrative format of the psychopathology present, compared with controls. Of these eight selected studies, seven reported at least one significant difference (p <.05) in the psychopathology of the cannabis group to the control group used as a comparator. Discussion and Conclusion: This study should be interpreted with great caution and conclusions should not be generalized. These findings do not suggest that "cannabis psychosis" does not exist, only that from a psychopathological perspective it may not be qualitatively any different from other forms of psychosis. Future research in this area needs to focus on clarifying the definition or description of "cannabis psychosis" and the use of standardized robust experimental and/or observational designs to eliminate heterogeneity that may lead to inconclusive results.

    AB - Background: The term "cannabis psychosis" has become ubiquitous in the psychiatric literature. Few authors have described the precise psychopathology of this potentially distinct subtype of psychosis. Specifically, little attention has been paid to exploring whether cannabis psychosis is characterized by a psychopathology which is different from that of other types of psychosis. Objective: The purpose of this paper was to systematically review the literature for evidence of a specific constellation of symptoms which are consistently characteristic of cannabis psychosis within an inpatient psychiatric setting and to determine whether these combine to create a psychopathology which is distinct from that of other types of psychosis. Method: Systematic review using Meta-analysis Of Observational Studies in Epidemiology (MOOSE) guidelines. Results: 13 studies of the 439 identified met the inclusion criteria. Only eight studies had sufficient internal and external validity to allow comparison in a narrative format of the psychopathology present, compared with controls. Of these eight selected studies, seven reported at least one significant difference (p <.05) in the psychopathology of the cannabis group to the control group used as a comparator. Discussion and Conclusion: This study should be interpreted with great caution and conclusions should not be generalized. These findings do not suggest that "cannabis psychosis" does not exist, only that from a psychopathological perspective it may not be qualitatively any different from other forms of psychosis. Future research in this area needs to focus on clarifying the definition or description of "cannabis psychosis" and the use of standardized robust experimental and/or observational designs to eliminate heterogeneity that may lead to inconclusive results.

    UR - http://www.scopus.com/inward/record.url?scp=84885901900&partnerID=8YFLogxK

    U2 - 10.1111/j.1521-0391.2012.00295.x

    DO - 10.1111/j.1521-0391.2012.00295.x

    M3 - Article

    VL - 21

    SP - S88-S98

    JO - The American Journal on Addictions

    JF - The American Journal on Addictions

    SN - 1055-0496

    IS - Suppl 1

    ER -