Data Download

Accessing LASI-DAD Data

1. Registration and Agreement
   • Register on the Gateway to Global Aging Data Website.
   • Sign the Data Use Agreement (free of charge).
2. Download Data
   • Data and documentation are available for direct download after registration.
3. Step-by-Step Download Instructions
   • For detailed guidance on how to download data, refer to the Data Download Instruction Guide.

Data Products

• Cognition Tests
• Informant Report
• Geriatric Assessments
• Venous Blood Specimens

• Cognition Tests
• Informant Report
• Geriatric Assessments

• Data File
• Data Description and Codebook

• Harmonized Data
• Codebook
• Stata Creation Code

• Data File
• User Guide

Citation

When using LASI-DAD data, please using the following citation:

• Jinkook Lee, A.B. Dey, Sarah Petrosyan, Pranali Khobragade, Albert Weerman, Sandy Chien, Joyita Banerjee, Alden Gross, Emma Nichols, Peifeng Hu, Eileen Crimmins, Marco Angrisani, Erik Meijer, Kenneth Langa, Mathew Varghese, Sharmistha Dey (2025). Harmonized Diagnostic Assessment of Dementia for the Longitudinal Aging Study in India (LASI-DAD) Version B.1 Data, doi:10.25549/h5wx-ay45. Produced and distributed by the University of Southern California with funding from the National Institute on Aging (R01AG051125, U01AG065958).

Genomics Data

Global Screening Array (GSA) and Whole Genome Sequencing (WGS) data are available through the National Institute on Aging Genetics of Alzheimer’s Disease Data Storage Site (NIAGADS).

Global Screening Array (GSA) Data

• GWAS Data: Original genotype data from the GSA array (1008 scans from 993 unique subjects, including 960 LASI - DAD subjects).
• 1000 Genomes Imputed Data: Genotype data imputed to the 1000G reference panel (phase 3 v5).
• TopMed Imputed Data: Genotype data imputed to the TOPMed reference panel (r2).

Whole Genome Sequencing (WGS) Data

• Available as part of the Alzheimer’s Disease Sequencing Program Umbrella Release 4.

Neuroimaging Data

Neuroimaging data for a subsample of Wave 1 respondents (N=137) are available through the Image and Data Archive (IDA) hosted by the Laboratory of Neuro Imaging at the University of Southern California.

• Available Modalities: MRI data in DICOM or NIFTI formats.
• Access: Permission can be requested by signing and submitting a data use application.