Researchers from Australia and the UK found that people with a schizophrenia diagnosis almost four times more likely than controls to have a history of childhood adversity. The quality of the evidence in this meta-analysis of the currently available data was found to be very strong (p<0.00001). No difference in rates of childhood adversity were found between schizophrenia and affective psychosis, depression, and personality disorders. Rates of childhood adversity is slightly higher in dissociative disorders and PTSD. Results will appear in Psychological Medicine.