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

15880

Study Description
Data Dictionary

5f2. Region affected by arthritis. (Select all that apply) (loc_arthr)

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

Overview

Valid: 51

Range: -

Format:

Questions and instructions

Question pretext

[arthrit]='1' or [arthrit]='2'

Categories

Value	Category	Cases
arthupex	5f2a. Upper extremity	15	29.4%
arthloex	5f2b. Lower extremity	3	5.9%
arthspin	5f2c. Spine	13	25.5%
arthunk	5f2d. Region unknown	20	39.2%

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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