NIMH Data Archive (NDA)
Overview
The NIMH Data Archive (NDA) is the NIH National Institute of Mental Health’s controlled-access repository for human subjects research data on brain development, psychiatric disorders, and related conditions. Established to support NIMH’s data sharing policy requirements, it mandates that all NIMH-funded investigators submit research data and associated metadata for archiving and secondary use by the broader research community. Access requires completion of a Data Use Certification (DUC) reviewed by a data access committee, with all use restricted to non-commercial research purposes.
Scope and Data Structure
The NDA covers neuroimaging, genomics, clinical assessments, cognitive measures, and behavioural data from studies across the lifespan, including paediatric, adolescent, and adult populations. A defining characteristic of the NDA is its use of standardised data structures: all contributing investigators must map their data elements to centrally defined NDA data structures, enabling cross-study harmonisation and federated querying across the archive. The NDA Query Tool allows researchers to identify participants and variables of interest across studies before submitting a data access request.
Key Datasets
The flagship dataset is the Adolescent Brain Cognitive Development (ABCD) Study, a longitudinal multisite study of brain development in approximately 10,000 children recruited at ages 9 to 10 across 21 US sites. Other major hosted studies include the Human Connectome Project Development (HCP-D), the Healthy Brain and Cognitive Development (HBCD) study, and numerous NIMH-funded R01 and clinical trial datasets.
Connections
- Funded by: NIH BRAIN Initiative (for brain development data mandates)
- Data sharing mandate: NIH Open Science Policy
Resources
- https://nda.nih.gov
- https://nda.nih.gov/get/access-data.html (data access request)
- https://nda.nih.gov/abcd (ABCD Study portal)