Background and Aims Several studies have described an association between very preterm birth and psychiatric problems later in life. We aimed to investigate whether young adults who were born very preterm (VPT) (< 33 gestational weeks) are at increased risk of experiencing non-clinical psychotic symptoms compared to controls (e.g., delusional ideation) and whether such symptoms are associated with altered brain maturation. Methods Sixty-four VPT born individuals and 39 controls (mean age 20 years) completed the Peters' Delusional Inventory, which measures psychosis proneness in the general population. Structural MRI data collected at age 15 years were used to investigated possible anatomical correlates of psychosis proneness, by subdividing the sample according to high (>=8; VPT: 40.6%, controls: 48.7%) and low (< 8) PDI scores. Results The groups did not differ in PDI scores (χ
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