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Uniform Data Set version 4
UDSv4 - Template

United States
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
15237

5. Cognitively impaired, not MCI reason (loc_impnomci)

Data file: UDSv4TemplateForXMLD_2026-04-14_0731.REDCap.xml

Overview

Valid: 38
Range: -
Format:

Questions and instructions

Question pretext
[mci]='0'
Categories
Value Category Cases
1 Evidence of functional impairment (e.g. 11
28.9%
2 Cognitive testing is abnormal but no clinical concern or functional decline (e.g. 18
47.4%
3 Longstanding cognitive difficulties 9
23.7%
4 Other 0
0%
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
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