Comparative mortality of persons with intellectual disability in California: an update (2000-2010).

This paper updates our 2003 study on the effect of intellectual disability (ID) on mortality in persons with no significant physical disability. As previously, we used the California Department of Developmental Services database to compute mortality rates by age, sex, and severity of ID. There were 64,207 subjects age 5 and older, who contributed 386,000 person-years of follow-up and 1514 deaths during the 2000 to 2010 study period. The excess death rates increased with age, ranging from 0.1 to 6.8 per 1000 in mild/moderate ID, and 3.4 to 6.7 in severe/profound.