Longitudinal Aging Study in India (LASI), is a nationally representative survey of
the health, economic, and social wellbeing of the Indian population aged 45 and older. Its large sample of 60,000
adults represents not only the country as a whole, but also each state.
LASI - Diagnostic Assessment of Dementia (DAD), is an in-depth study of late-life cognition and dementia,
drawing a sub-sample of 3,000 LASI respondents aged 60 or older. It administers in-depth cognitive tests and
informant interviews, following the Health and Retirement Study's Harmonized Cognitive Aging Project (HCAP)
protocol. It also conducts a comprehensive geriatric assessment in collaboration with 12 regional geriatric