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Journal Article

The influence of religious activity and polygenic schizophrenia risk on religious delusions in schizophrenia

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Kalman,  Janos L.
IMPRS Translational Psychiatry, Max Planck Institute of Psychiatry, Max Planck Society;

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Comes,  Ashley L.
IMPRS Translational Psychiatry, Max Planck Institute of Psychiatry, Max Planck Society;

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Andlauer,  Till F. M.
Dept. Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Max Planck Society;

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Citation

Anderson-Schmidt, H., Gade, K., Malzahn, D., Papiol, S., Budde, M., Heilbronner, U., et al. (2019). The influence of religious activity and polygenic schizophrenia risk on religious delusions in schizophrenia. SCHIZOPHRENIA RESEARCH, 210, 255-261. doi:10.1016/j.schres.2018.12.025.


Cite as: https://hdl.handle.net/21.11116/0000-0009-98EF-F
Abstract
Background: Religious delusions are a common symptom in patients experiencing psychosis, with varying prevalence rates of religious delusions across cultures and societies. To enhance our knowledge of this distinct psychotic feature, we investigated the mutually-adjusted association of genetic and environmental factors with occurrence of religious delusions.
Methods: We studied 262 adult German patients with schizophrenia or schizoaffective disorder. Associationwith lifetime occurrence of religious delusions was tested by multiple logistic regression for the following putative predictors: self-reported degree of religious activity, DSM-IV diagnosis, sex, age, education level, marital status, presence of acute delusion at the time of interview and an individual polygenic schizophrenia-risk score (SZPRS, available in 239 subjects).
Results: Of the 262 patients, 101 (39%) had experienced religious delusions. The risk of experiencing religious delusions was significantly increased in patients with strong religious activity compared to patients without religious affiliation (OR = 3.6, p = 0.010). Low or moderate religious activity had no significant effect. The same analysis including the SZ-PRS confirmed the effect of high religious activity on occurrence of religious delusions (OR = 4.1, p = 0.008). Additionally, the risk of experiencing religious delusions increased with higher SZ-PRS (OR 1.4, p= 0.020, using pT= 0.05 for SZ-PRS calculation). None of the other variables were significantly associated with lifetime occurrence of religious delusions.
Conclusions: Our results suggest that strong religious activity and high SZ-PRS are independent risk factors for the occurrence of religious delusions in schizophrenia and schizoaffective disorder. (C) 2018 Published by Elsevier B.V.