The Harmonized Diagnostic Assessment of Dementia for the Longitudinal Aging Study in India (LASI-DAD) is an add-on study to the Longitudinal Aging Study in India (LASI) focused on late-life cognition and dementia. LASI is an ongoing, multi-purpose cohort study of 72,000 community-residing older adults aged 45 and older and their spouses regardless of age, with an oversample of persons aged 65 and above. Using the Census as the sampling frame, LASI was representative of both the nation as a whole and each state and union territory. LASI-DAD also drew a nationally representative, sub-sample of 4,096 LASI participants aged 60 and above and administered an in-depth cognitive test battery and informant interview that is harmonized with the U.S. Health and Retirement Study and its sister studies around world.

Jinkook Lee, Ph.D.
University of Southern California

Sharon Kardia, Ph.D.
University of Michigan

A.B. Dey, Ph.D.
All India Institute of Medical Sciences

R01-AG051125, U01- AG065958

Acknowledgment statement for any data distributed by NIAGADS:

Data for this study were prepared, archived, and distributed by the National Institute on Aging Alzheimer’s Disease Data Storage Site (NIAGADS) at the University of Pennsylvania (U24-AG041689), funded by the National Institute on Aging.

For investigators using LASI-DAD data:

In text: "The Longitudinal Aging Study in India, Diagnostic Assessment of Dementia data is sponsored by the National Institute on Aging (grant number R01AG051125, RF1AG055273, U01AG065958) and is conducted by the University of Southern California."

In references: "The Longitudinal Aging Study in India, Diagnostic Assessment of Dementia Study. Produced and distributed by the University of Southern California with funding from the National Institute on Aging (grant number R01AG051125, RF1AG055273, U01AG065958), Los Angles, CA."

  • Lee J, Dey AB. Introduction to LASI-DAD: The Longitudinal Aging Study in India-Diagnostic Assessment of Dementia. J Am Geriatr Soc. 2020 Aug;68 Suppl 3(Suppl 3):S3-S4. doi: 10.1111/jgs.16740. PMID: 32815600; PMCID: PMC7513796. PubMed link
  • Lee J, Khobragade PY, Banerjee J, Chien S, Angrisani M, Perianayagam A, Bloom DE, Dey AB. Design and Methodology of the Longitudinal Aging Study in India-Diagnostic Assessment of Dementia (LASI-DAD). J Am Geriatr Soc. 2020 Aug;68 Suppl 3(Suppl 3):S5-S10. doi: 10.1111/jgs.16737. PMID: 32815602; PMCID: PMC7503220. PubMed link
  • Smith JA, Zhao W, Yu M, Rumfelt KE, Moorjani P, Ganna A, Dey AB, Lee J, Kardia SLR. Association Between Episodic Memory and Genetic Risk Factors for Alzheimer’s Disease in South Asians from the Longitudinal Aging Study in India-Diagnostic Assessment of Dementia (LASI-DAD). J Am Geriatr Soc. 2020 Aug;68 Suppl 3(Suppl 3):S45-S53. doi: 10.1111/jgs.16735. PMID: 32815605; PMCID: PMC7507858. PubMed link