Janneke Spauwen

TL;DR: Cannabis use moderately increases the risk of psychotic symptoms in young people but has a much stronger effect in those with evidence of predisposition for psychosis.

TL;DR: Exposure to psychological trauma may increase the risk of psychotic symptoms in people vulnerable to psychosis.

TL;DR: The findings suggest that environmental risks for psychosis act additively, and that the level of environmental risk combines synergistically with non-clinical developmental expression of psychosis to cause abnormal persistence and, eventually, need for care.

TL;DR: These findings suggest that normal maturational changes in adolescence with differential age of onset in boys and girls cause the expression of psychosis, the extreme of which is schizophrenia.

TL;DR: Growing up in an urban area was associated with an increased risk of expression of psychosis in the adolescents and young adults (adjusted OR 1.31, 95% CI 1.03-1.66), and the proxy environmental risk factor that urbanicity represents may shift a relatively large section of the adolescent population along a continuum ofexpression of psychosis.