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

14823

Study Description
Data Dictionary

4a. Agitation/aggression -- Is the patient resistive to help from others at times, or hard to handle? (agit)

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

Overview

Valid: 58

Range: -

Format:

Questions and instructions

Question pretext

[modeb5]<>'0'

Categories

Value	Category	Cases
1	Yes	18	31%
0	No	21	36.2%
9	Unknown	19	32.8%

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.

Back to Catalog