Frailty and Disability in Older Adults with Intellectual Disabilities: Results from the Healthy Ageing and Intellectual Disability Study

OBJECTIVES: To obtain first insight into prevalence and correlates of frailty in older people with intellectual disability (ID). DESIGN: Population-based cross-sectional study in persons using formal ID services. SETTING: Three Dutch care provider services. PARTICIPANTS: Eight hundred forty-eight individuals with borderline to profound ID aged 50 and older participating in the Healthy Ageing and Intellectual Disability (HA-ID) Study. MEASUREMENTS: All participants underwent an extensive health examination. Frailty was diagnosed according to Cardiovascular Health Study criteria. Associations between frailty and participant characteristics were investigated using multivariate logistic regression analysis. RESULTS: Prevalence of frailty was 11% at age 50 to 64 and 18% at age 65 and older. Age, Down syndrome, dementia, motor disability, and severe ID were significantly associated with frailty, but only motor disability had a unique association with frailty. In a regression model with these variables, 25% of the variance of frailty was explained. CONCLUSION: At age 50 to 64, prevalence of frailty is as high as in the general population aged 65 and older (7-9%), with a further increase after the age of 65. Motor disability only partially explains frailty. Future studies should address health outcomes, causes, and prevention of frailty in this population.