Psychosis and adults with intellectual disabilities

Cooper, S., Smiley, E., Morrison, J.M., Allan, L., Williamson, A., Finlayson, J., Jackson, A. and Mantry, D. (2007) Psychosis and adults with intellectual disabilities. Social Psychiatry and Psychiatric Epidemiology, 42(7), pp. 530-536. (doi: 10.1007/s00127-007-0197-9)

Abstract

Objective To determine the point prevalence, incidence, and remission over a 2-year period of psychosis in adults with intellectual disabilities, and to investigate demographic and clinical factors hypothesised to be associated with psychosis. Method A population-based cohort of adults with intellectual disabilities (n = 1,023) was longitudinally studied. Comprehensive face-to-face mental health assessments to detect psychosis, plus review of family physician, psychiatric, and psychology case notes were undertaken at two time points, 2 years apart. Results Point prevalence is 2.6% (95% CI = 1.8–3.8%) to 4.4% (95% CI = 3.2–5.8%), dependant upon the diagnostic criteria employed. Two-year incidence is 1.4% (95% CI = 0.6–2.6), and for first episode is 0.5% (95% CI = 0.1–1.3). Compared with the general population, the standardised incidence ratio for first episode psychosis is 10.0 (95% CI = 2.1–29.3). Full remission after 2 years is 14.3%. Visual impairment, previous long-stay hospital residence, smoking, and not having epilepsy were independently associated with psychosis, whereas other factors relevant to the general population were not. Conclusions The study of psychosis in persons with intellectual disabilities benefits the population with intellectual disabilities, and advances the understanding of psychosis for the general population. Mental health professionals need adequate knowledge in order to address the high rates of psychosis in this population.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Allan, Mrs Linda and Jackson, Dr Alison and Smiley, Dr Elita and Finlayson, Miss Janet and Morrison, Professor Jill and Cooper, Professor Sally-Ann
• Authors: Cooper, S., Smiley, E., Morrison, J.M., Allan, L., Williamson, A., Finlayson, J., Jackson, A., and Mantry, D.
• College/School: College of Medical Veterinary and Life Sciences > School of Health & Wellbeing > Mental Health and Wellbeing; College of Medical Veterinary and Life Sciences > School of Health & Wellbeing > General Practice and Primary Care; College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
• Journal Name: Social Psychiatry and Psychiatric Epidemiology
• ISSN: 0933-7954
• ISSN (Online): 1433-9285