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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
16104

1g. Visuospatial/executive -- Trails (mocatrai)

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

Overview

Valid: 0
Range: -
Format:

Questions and instructions

Question pretext
[mocacomp]='1' and [loc_c2_or_c2t]='C2'
Categories
Value Category
0 0
1 1
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.
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