This was a longitudinal, retrospective, population register-based, case-control study. The ID group included 7,936 people aged 55+ who in 2012 received services according to the Act concerning Support and Service for Persons with Certain Functional Impairments, and who were classified with ID from birth or early age. An equally large matched control group was selected from the Swedish Population Register. The sample was divided into four age groups; 55-59, 60–63, 64–69; and >69 years. In- and outpatient data was collected from the Swedish National Patient Register for 2002-2012.