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Exposure to household pet cats and dogs in childhood and risk of subsequent diagnosis of schizophrenia or bipolar disorder

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  • Robert Yolken
  • Cassie Stallings
  • Andrea Origoni
  • Emily Katsafanas
  • Kevin Sweeney
  • Amalia Squire
  • Faith Dickerson

Abstract

Background: Serious psychiatric disorders such as schizophrenia and bipolar disorder have been associated with environmental exposures in early life. Contact with household pets such as cats and dogs can serve as a source of environmental exposure during these time periods. Methods: We investigated the relationship between exposure to a household pet cat or dog during the first 12 years of life and having a subsequent diagnosis of schizophrenia or bipolar disorder. These studies were performed in a cohort of 396 individuals with schizophrenia, 381 with bipolar disorder, and 594 controls. The hazards of developing schizophrenia or bipolar disorder associated with first exposure to a household pet cat or dog were calculated using Cox Proportional Hazard and multivariate logistic regression models including socio-demographic covariates. Results: We found that exposure to a household pet dog was associated with a significantly decreased hazard of having a subsequent diagnosis of schizophrenia (Hazard Ratio .75, p

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  • Robert Yolken & Cassie Stallings & Andrea Origoni & Emily Katsafanas & Kevin Sweeney & Amalia Squire & Faith Dickerson, 2019. "Exposure to household pet cats and dogs in childhood and risk of subsequent diagnosis of schizophrenia or bipolar disorder," PLOS ONE, Public Library of Science, vol. 14(12), pages 1-15, December.
    • Handle: RePEc:plo:pone00:0225320
    DOI: 10.1371/journal.pone.0225320
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