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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
14459

(C2 Q6a/C2T Q5a) Number of correct trials (digbacct)

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

Overview

Valid: 0
Range: -
Format:

Questions and instructions

Question pretext
[loc_c2_or_c2t]<>''
Categories
Value Category
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12
13 13
14 14
95 95 = Physical problem
96 96 = Cognitive/behavior problem
97 97 = Other problem
98 98 = Verbal refusal
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.

Others

Notes
Field Note : (0-14, 95-98)
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