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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
13033

9. Are you left- or right-handed (for example, which hand would normally be used for writing or throwing a ball)? (handed)

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

Overview

Valid: 54
Range: -
Format:

Questions and instructions

Question pretext
[packet]='I' OR [packet]='I4'
Categories
Value Category Cases
1 Left-handed 7
13%
2 Right-handed 11
20.4%
3 Ambidextrous 17
31.5%
9 Don't know 19
35.2%
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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