The association between stressful childhood experiences (SCE) and psychotic symptoms is still not clearly understood, and different causal pathways have been proposed. Generalized estimating equation modeling was used to test the dose–response relationship between SCE and delusions and hallucinations at baseline and follow-up periods and the possible confounding effects of dissociation on this relationship. The prevalence of SCE in individuals with psychotic disorders was high, with more co-occurring SCE categories being positively associated with more types of delusions and hallucinations. Each additional SCE was associated with a 1.20 increase in the incidence rate ratio (95% confidence interval [CI; 1.09, 1.32]) for hallucinations and a 1.19 increase (CI [1.09, 1.29]) for delusions, supporting a dose–response association. After we controlled for the mediating effects of dissociative symptoms at follow-up, SCE remained independently associated with delusions. We propose that cumulative SCE can result in complex trauma reactions that present with a broad range of symptomatology, including dissociative, posttraumatic stress disorder, and psychotic symptoms.

Stressful childhood experiences (SCE) are associated with a variety of health and social problems. In people with severe mental illness (SMI) traumatic childhood experiences have been linked to more severe and treatment refractory forms of psychiatric symptoms, including psychotic symptoms. This study evaluates the use of psychotropic medication groups in a population of people with SMI and SCE, testing the association between SCE and prescription medication in an SMI population. A sample of 183 participants with SMI was divided into 2 exposure groups: high SCE (4 to 7 categories of SCE) and low SCE (0 to 3 categories of SCE). Both groups were compared in regard to prescribed dosing of psychotropic medications (antipsychotics, mood stabilizers, antidepressants, and anxiolytics/hypnotics). Participants who endorsed high SCE received higher doses of antipsychotic medications and mood stabilizers than those with low exposure. The results demonstrate that people with higher SCE categories received a higher dosing of psychotropic medication, specifically antipsychotic medication and mood stabilizers.