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central

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
14625

How many treatments/trials? (loc_trt_num)

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

Overview

Valid: 58
Range: -
Format:

Questions and instructions

Question pretext
[trtbiomark]='1'
Categories
Value Category Cases
1 1 10
17.2%
2 2 5
8.6%
3 3 6
10.3%
4 4 10
17.2%
5 5 4
6.9%
6 6 6
10.3%
7 7 6
10.3%
8 8 11
19%
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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