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

14012

Study Description
Data Dictionary

5f1. Type of arthritis (Select all that apply) (loc_arth)

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

Overview

Valid: 49

Range: -

Format:

Questions and instructions

Question pretext

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

Categories

Value	Category	Cases
arthrrheum	5f1a. Rheumatoid	13	26.5%
arthrosteo	5f1b. Osteoarthritis	16	32.7%
arthrothr	5f1c. Other {arthtypx}	0	0%
arthtypunk	5f1d. Unknown	20	40.8%

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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