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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
13822

2. Facial expression (facexp)

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

Overview

Valid: 60
Range: -
Format:

Questions and instructions

Question pretext
[pdnormal] <> '1'
Categories
Value Category Cases
0 Normal 8
13.3%
1 Minimal hypomimia, could be normal "poker face" 7
11.7%
2 Slight but definitely abnormal diminution of facial expression 13
21.7%
3 Moderate hypomimia; lips parted some of the time 12
20%
4 Masked or fixed facies with severe or complete loss of facial expression; lips parted 1/4 inches or more 12
20%
8 Untestable 8
13.3%
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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