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

13842

(C2 Q2b1/C2T Q2a1) Language of test administration -- Other: Specify (npsylanx)

Valid: 57

Range: -

Format: character

Question pretext

[npsylan] = '3'

Notes

Field Note : Any text or numbers with the exception of single quotes ('), double quotes ("), ampersands (&), and percentage signs (%).

Back to Catalog