Psychotic experiences could be caused by trauma in childhood

Researchers at the University of Bristol have established greater evidence for a causal link between trauma in childhood and psychotic experiences at 18 years old. The findings, published today (21 November) in JAMA Psychiatry , are the first to comprehensively examine the association between different types of trauma, and their timing in childhood with later psychotic experiences using a large population study. Psychotic experiences include abnormal experiences such as hearing voices or feelings of paranoia Researchers used Bristol's Children of the 90s longitudinal data to examine 4,433 participants who had clinical interviews and attended clinics at the age of 18. The study concludes that between 25 and 60 per cent of the young people who reported psychotic experiences (five per cent of the sample) would not have developed these if they had not been exposed to trauma such as bullying, domestic violence or emotional neglect as a child. The results were consistent regardless of socio-economic status or genetic risk of mental health difficulties, which could inform future research and the development of interventions. PHD student in the Centre for Academic Mental Health Jazz Croft said: "As around five per cent of the population have psychotic experiences at some point in their life, and these often lead to further mental health issues, it is important that we understand more about the role trauma has in increasing this risk.