Over 15 years, 294 out of 961 (30.6%) adults with learning disabilities died. 64 out of 179 (35.8%) adults with Down syndrome died. 230 out of 783 (29.4%) adults without Down syndrome died. Deaths were more than five times as common for the adults with Down syndrome, compared with other people. Deaths were almost twice as common for the adults without Down syndrome. The difference in death rate compared with other people decreased as age increased. When other factors (like health problems) were taken into account, level of learning disabilities was not a risk factor for death.
Many types of causes of death were more common than in other people. The most common causes of death were dementia, then infections, for the adults with Down syndrome. The most common causes of death were breathing food or liquid into airways when trying to swallow/ breathing in vomit during heartburn/ choking, and lung infections, for the adults without Down syndrome. 29.8% of all the deaths could have been stopped by better care. This is more than twice as common compared with other people. 60.3% died in hospital. Adults who were tube-fed, older, smokers, and who had Down syndrome, diabetes, lung infections, epilepsy, hearing problems, or more prescribed drugs, were more likely to die.