Prevalence and general health status of people with intellectual disabilities in Scotland: a total population study
Journal of Epidemiology and Community Health
Prevalence of intellectual disabilities varies considerably between studies. People with intellectual disabilities experience health inequalities, but most studies comprise small or incomplete populations. We investigate in a whole country population (1) prevalence of intellectual disabilities, (2) general health status compared with the general population. Method: Data were from Scotland's Census, 2011. We calculated the prevalence of intellectual disabilities; reported general health status
... ral health status of people with and without intellectual disabilities; and the extent of health-related limitations to daily activities. We conducted logistic regressions to determine the odds ratios of intellectual disabilities predicting poor health, and associations with age and gender. Results: Of Scotland's 5,295,403 population, 26,349 (0.5%) had intellectual disabilities; 15,149 (57.5%) males and 11,200 (42.5%) females; 5,234 (0.6%) children/youth (0-15), and 21,115 (0.5%) adults (16-75+). Identification of intellectual disabilities rises until age 5 years, with a further small rise by age 9. Children and adults with intellectual disabilities reported poorer health (47.9% and 40.3%), than the general population (2.1% and 13.8%), and were more limited in activities by their health. Intellectual disabilities had an odds ratio of 43.2 (95% CI 40.8-45.7) in predicting poor health; the influence of increasing age on poor health was markedly interacted by presence of intellectual disabilities, likely to be due to a "healthy survivor" effect within the intellectual disabilities population. Conclusion: People with intellectual disabilities have poorer general health than other people, especially children and young people. Accurate information on population prevalence and health status is essential to plan appropriate resources.