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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
12019

2. Fluid Biomarkers - Were fluid biomarkers used for assessing the etiological diagnosis? (fluidbiom)

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

Overview

Valid: 55
Range: -
Format:

Questions and instructions

Question pretext
[biomarkdx]=1
Categories
Value Category Cases
0 No 17
30.9%
1 Yes, only blood-based biomarkers were used 13
23.6%
2 Yes, only CSF-based biomarkers were used 12
21.8%
3 Yes, both blood- and CSF-based biomarkers were used 13
23.6%
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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