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IDS-TILDA is a longitudinal study researching ageing in Ireland among people with an intellectual disability aged 40 and over. This study is the first of its kind in Europe, and the only study able to directly compare the ageing of people with intellectual disability with the general ageing population.

The underpinning values of IDS-TILDA are inclusion, choice, empowerment, person centred, the promotion of people with intellectual disability, the promotion of best practice and to make a contribution to the lives of people with intellectual disability.


To identify the principal influences on successful ageing in persons with intellectual disability, and then determine if they are the same or different from the influences for the general population. A second aim is to develop a first wave baseline picture of ageing among persons with intellectual disability and a cohort of subjects that may then be followed longitudinally.


  • To understand the health characteristics and status of persons with intellectual disability as they age
  • To examine the service needs and health service utilization of older persons with intellectual disability as compared to the general population
  • To identify disparities in the health status of older persons with intellectual disability as compared to findings yielded by TILDA for the general population
  • In preparation for longitudinal follow-up, to determine potential
    • Risk factors for ill health
    • Facilitators of good health and longevity
    • Biological and environmental components of successful ageing