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Breast Cancer Incidence Higher in Schizophrenia

JAMA Psychiatry; ePub 2018 Mar 7; Zhuo, et al

The incidence of breast cancer in women with schizophrenia is higher than that of the general female population, according to a recent study. However, significant heterogeneity exists among the included studies. This indicates that women with schizophrenia deserve intensive prevention and treatment of breast cancer. A literature search was conducted using the terms schizophrenia, schizophrenic, psychosis, combined with breast and cancer, tumor, neoplasm, or carcinoma. The final literature search was performed on August 15, 2017. 12 cohorts including 125,760 women were included in this meta-analysis. Researchers found:

  • Schizophrenia was associated with a significantly increased risk of breast cancer incidence in women (significantly increased risk, 1.31), with significant heterogeneity (I2 = 89%).
  • Substantial between-study variance was also suggested by the wide prediction interval (0.81-2.10).
  • The subgroup analysis results showed that the association was not significantly affected by whether breast cancer cases were excluded at baseline or the sample size of the included studies.
Citation:

Zhuo C, Triplett PT. Association of schizophrenia with the risk of breast cancer incidence. A meta-analysis. [Published online ahead of print March 7, 2018]. JAMA Psychiatry. doi:10.1001/jamapsychiatry.2017.4748.

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