Uniform Data Set version 4
UDSv4 - Template

Reference ID

USDv4

Producer(s)

National Alzheimer’s Coordinating Center (NACC) and the NIA-funded ADRC network

Collections

Clinical Trial

Metadata

DDI/XML JSON

Created on

Jul 02, 2026

Last modified

Jul 07, 2026

Page views

12318

1b. Participant's year of birth (birthyr)

Valid: 59

Mean: 46.43

var_std: 6.41

Range: -

Format: Numeric

Question pretext

[packet]='I' OR [packet]='I4'

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