Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

There are 9 million prisoners worldwide, but it is uncertain what proportion have intellectual disabilities. Such prisoners have been identified as a vulnerable group at risk of victimization and mental illness. Psychiatric surveys based on interviews of unselected prison populations were sought, involving diagnoses of intellectual disabilities. The search was performed by computer-assisted searches, scanning of relevant reference lists, hand-searching of journals, and correspondence with authors of relevant reports. Prevalence rates of intellectual disabilities by gender and other potentially relevant study characteristics were abstracted from publications, supplemented by information from authors of reports. Ten relevant surveys from four different countries were identified that included a total of 11,969 prisoners (mean age: 29 years; 92% male; 23% violent offenders). No formal calculation of a summary estimate of prevalence was undertaken due to substantial heterogeneity. The results suggest that typically 0.5-1.5% of prisoners were diagnosed with intellectual disabilities (range 0% to 2.8% across studies). We conclude that the number of prisoners with intellectual disabilities is considerable and discuss implications for policy and practice.

Original publication

DOI

10.1016/j.ijlp.2008.06.001

Type

Journal article

Journal

Int J Law Psychiatry

Publication Date

2008

Volume

31

Pages

369 - 373

Keywords

Adult, Cross-Cultural Comparison, Dangerous Behavior, Data Collection, Female, Forensic Psychiatry, Humans, Intellectual Disability, Male, Prevalence, Prisoners, Prisons