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

12700

Study Description
Data Dictionary

3g1-7. Race - White - Countries (loc_white)

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

Overview

Valid: 51

Range: -

Format:

Questions and instructions

Question pretext

[loc_racewhite(1)] = 1

Categories

Value	Category	Cases
1	3g1. English	16	31.4%
2	3g2. German	10	19.6%
3	3g3. Irish	1	2%
4	3g4. Italian	8	15.7%
5	3g5. Polish	14	27.5%
6	3g6. Scottish	1	2%
7	3g7. Other (For example	1	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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