Name Steward Organization Suggested Domain Suggested Domain Description Cde Group Classification
Participant age at time of MRI NACC Demographic information
Patient and caregiver demographic information
 Other NIA-funded studies
  • ▼ NACC
    • ▼ Mixed-Protocol MRI Data
      • ▼ Section name- SECTION 1: MRI SCAN DATE INFORMATION
        • Variable name- NACCMRIA

# Datatype Datatype number min value Datatype number max value

UUID: 3cef99a2-6f23-5f45-90cd-1185f54c3135

Number 18.0 120.0

# Permissible value Value meaning name

UUID: 2aa71601-491a-53f4-9be4-b5855c20fd8f

888 Not applicable/no MRI available

# Definition Sources

UUID: 071cc6e9-570b-54d7-905a-a7ce99243988

This variable provides the participant's age at the time of the MRI session. Birth month and birth year are required elements in the UDS; however, birth day is not collected. To calculate age at MRI, birth day is set to 1 for all UDS participants, and NACCMRIA is computed as MRI date - birth date. NACC Mixed-Protocol MRI Data

# Identifier Origin Version

UUID: 9b0aca4b-7e1f-5c83-b83a-331e78dbd15e

Mixed-Protocol MRI Data_SECTION 1: MRI SCAN DATE INFORMATION_NACCMRIA NACC-source_dataset_name+section_name+variable_name NACC_Mixed-Protocol MRI Data 2026