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

11673

Study Description
Data Dictionary

5e. Rigidity - left lower extremity (rigdlolf)

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

Overview

Valid: 60

Range: -

Format:

Questions and instructions

Question pretext

[pdnormal] <> '1'

Categories

Value	Category	Cases
0	Absent	9	15%
1	Slight or detectable only when activated by mirror or other movements	2	3.3%
2	Mild to moderate	7	11.7%
3	Marked, but full range of motion easily achieved	3	5%
4	Severe; range of motion achieved with difficulty	10	16.7%
8	Untestable	29	48.3%

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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