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  • Olfactory identification deficit and its relationship with hedonic traits in patients with first-episode schizophrenia and individuals with schizotypy

    Author(s)
    Zou, LQ
    Zhou, HY
    Lui, SSY
    Wang, Y
    Wang, Y
    Gan, J
    Zhu, XZ
    Cheung, EFC
    Chan, RCK
    Griffith University Author(s)
    Chan, Raymond
    Year published
    2018
    Metadata
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    Abstract
    Objective: Olfactory identification impairments have been consistently found in schizophrenia patients. However, few previous studies have investigated this in first-episode patients. There are also inconsistent findings regarding olfactory identification ability in psychometrically-defined schizotypy individuals. In this study, we directly compared the olfactory identification ability of first-episode schizophrenia patients with schizotypy individuals. The relationship between olfactory identification impairments and hedonic traits was also examined. Methods: Thirty-five first-episode schizophrenia patients, 40 schizotypy ...
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    Objective: Olfactory identification impairments have been consistently found in schizophrenia patients. However, few previous studies have investigated this in first-episode patients. There are also inconsistent findings regarding olfactory identification ability in psychometrically-defined schizotypy individuals. In this study, we directly compared the olfactory identification ability of first-episode schizophrenia patients with schizotypy individuals. The relationship between olfactory identification impairments and hedonic traits was also examined. Methods: Thirty-five first-episode schizophrenia patients, 40 schizotypy individuals as defined by the Chapman's Anhedonia Scales and 40 demographically matched controls were recruited. The University of Pennsylvania Smell Identification Test was administered. Hedonic capacity was assessed using the Temporal Experience of Pleasure Scale (TEPS). Results: The results showed that both the schizophrenia and schizotypy groups showed poorer olfactory identification ability than controls, and the impairment was significantly correlated with reduced pleasure experiences. Conclusion: Our findings support olfactory identification impairment as a trait marker for schizophrenia.
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    Journal Title
    Progress in Neuro-Psychopharmacology and Biological Psychiatry
    Volume
    83
    DOI
    https://doi.org/10.1016/j.pnpbp.2018.01.014
    Subject
    Biomedical and clinical sciences
    Clinical sciences
    Neurosciences
    Psychology
    Publication URI
    http://hdl.handle.net/10072/385207
    Collection
    • Journal articles

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