The occurrence of at least one lifetime traumatic event was associated with a 2.5 times greater risk

Similarly, the occurrence of at least one lifetime traumatic event was associated with a 4.8 times greater risk

It is also of note that a history of lifetime trauma was associated with higher scores on the Cardiff Anomalous Perception Scale factors of temporal lobe experience, and clinical psychosis

A number of studies, in both clinical and non-clinical populations, have found an association of trauma and psychotic symptoms

The evidence for the association between trauma and psychosis is strongest for the occurrence of hallucinations

A history of childhood abuse increased the risk for the subsequent development of psychotic symptoms by over 10 times.

The evidence for the association between trauma and psychosis is strongest for the occurrence of hallucinations

If trauma has a causal role, then its influence on delusions and hallucinations may be somewhat different. For instance, the role of trauma in hallucinations may be quite direct, whereby trauma-related intrusions and flashbacks enter the content of hallucinations

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2748122/

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