Identifying men at ultra high risk of psychosis in a prison population

Manuela Jarrett*, Tom Craig, Janet Parrott, Andrew Forrester, Toby Winton-Brown, Helen Maguire, Philip McGuire, Lucia Valmaggia

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Background: The prevalence of psychotic disorders among prisoners is relatively high. We sought to investigate the prevalence of men who have a very high risk of developing psychosis in a prison population. Methods: The Prodromal Questionnaire - Brief Version (Loewy, Pearson, Vinogradov, Bearden and Cannon, 2011), was used to screen newly-arrived prisoners in a London prison for features associated with an increased risk of psychosis. Concurrent validity was evaluated using the Comprehensive Assessment for At Risk Mental State (Yung et al., 2005). Results: 750 prisoners were screened and 301 were underwent further clinical assessment. 5% the total number of those screened met diagnostic criteria for the ARMS and 3% had recently developed a first episode of psychosis. Using endorsement of items that also caused distress, the PQ-B predicted an ARMS or a psychotic disorder with 90% sensitivity and 44% specificity. Conclusions: The PQ-B is effective in identifying people who are vulnerable to developing psychosis in a prison population.
Original languageEnglish
Pages (from-to)1-6
JournalSchizophrenia Research
Issue number1-3
Publication statusPublished - Apr 2012


  • Prevalence
  • At risk mental state
  • Prisoners
  • Early detection


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