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

15932

Study Description
Data Dictionary

3g. Limb dystonia - arm {loc_dystarm_lastvis} (dystarm)

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

Overview

Valid: 55

Range: -

Format:

Questions and instructions

Question pretext

[parksign]='1'

Categories

Value	Category	Cases
0	Absent	1	1.8%
1	Focal or Unilateral	17	30.9%
2	Bilateral & Largely Symmetric	7	12.7%
3	Bilateral & Largely Asymmetric	10	18.2%
8	Not Assessed	20	36.4%

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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