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Psychotic experiences and mood episodes predict each other bidirectionally: a 6-year follow-up study in a community-based population
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Psychotic experiences and mood episodes predict each other bidirectionally: a 6-year follow-up study in a community-based population
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Psychotic experiences and mood episodes predict each other bidirectionally: a 6-year follow-up study in a community-based population
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Journal Article
Psychotic experiences and mood episodes predict each other bidirectionally: a 6-year follow-up study in a community-based population
2019
Overview
Background
Psychotic experiences (PEs) are not exclusive to psychotic disorders and highly correlated with mood episodes. In this representative general population-based study, longitudinal bidirectional associations between the extended psychosis phenotype and mood episodes were investigated, accounting for other possible causes.
Methods
Households were contacted in a multistage clustered probability sampling frame covering 11 districts and 302 neighbourhoods at baseline (
n
= 4011) and at 6-year follow-up (
n
= 2185). Participants were interviewed with the relevant sections of the composite international diagnostic interview both at baseline and at follow-up. Sociodemographic, familial and environmental risk factors associated with the extended psychosis phenotype and mood episodes were assessed. Logistic regression and cross-lagged panel correlation models were used for the associations between the extended psychosis phenotype and mood episodes.
Results
PEs were associated with subsequent depressive and manic episodes. There was bidirectionality in that mood episodes were associated with subsequent PEs, and PEs were associated with subsequent mood episodes. The associations occurred in a sub-additive pattern. There were substantial synchronous and cross-lagged correlations between these psychopathology domains, with reciprocally similar cross-lagged correlations. Familial risk and adverse life events were associated with both psychopathology domains, whereas some sociodemographic risk factors and alcohol/cannabis use were associated with only one domain.
Conclusion
The sub-additive bidirectional associations between PEs and mood episodes over time and the similarity of cross-lagged correlations are suggestive of mutually causal connections between affective and psychotic domains of psychopathology.
