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

14880

4. Community Affairs (commun)

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

Overview

Valid: 58

Range: -

Format:

Questions and instructions

Categories

Value	Category	Cases
0	None = 0 Independent function at usual level in job, shopping, volunteer and social groupsNone = 0 Independent function at usual level in job, shopping, volunteer and social groups	9	15.5%
0.5	Questionable = 0.5 Slight impairment in these activitiesQuestionable = 0.5 Slight impairment in these activities	13	22.4%
1	Mild = 1 Unable to function independently at these activities, although may still be engaged in some; appears normal to casual inspectionMild = 1 Unable to function independently at these activities, although may still be engaged in some; appears normal to casual inspection	11	19%
2	Moderate = 2 No pretense of independent function outside the home; appears well enough to be taken to functions outside the family homeModerate = 2 No pretense of independent function outside the home; appears well enough to be taken to functions outside the family home	1	1.7%
3	Severe = 3 No pretense of independent function outside the home; appears too ill to be taken to functions outside the family homeSevere = 3 No pretense of independent function outside the home; appears too ill to be taken to functions outside the family home	13	22.4%
99	Not ApplicableNot Applicable	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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