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

Presentation First Author: 
Manuela Jarret

Background: Previous research has shown a high of psychotic disorders among prisoners compared to the general population. 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: 891 prisoners were screened and 354 underwent further clinical assessment. 5% of the total number of those screened met diagnostic criteria for the ARMS and 3% found to be experiencing their first episode of psychosis. The PQ-B was found to have good sensitivity but poor specificity. Participants who were positive at screen were more likely than those who were negative to have been homeless, experienced and witnessed violence as children, have had either an illness or serious injury as a child or teenager, have been racially discriminated against, have attempted suicide, have higher self ratings of both anxiety and depression, have a family psychiatric history and be misusing alcohol. Conclusions: The PQ-B is effective in identifying people who are vulnerable to developing psychosis in a prison population.

Conference Name: 
Presentation Date: 
January, 2013
Additional Authors: 
Manuela Jarret, Tom Craig, Janet Parrott, Andrew Foster, Toby Winton-Brown, Helen MaGuire, Philip McGuire, Lucia Valmaggia
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