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

12171

IVP Q1./FVP Q2. What is the co-participant's relationship to the participant? (inrelto)

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

Overview

Valid: 54

Range: -

Format:

Questions and instructions

Question pretext

[modea2] <> '0'

Categories

Value	Category	Cases
1	Spouse, partner, or companion (include ex-spouse, ex-partner, fiancé(e), boyfriend, girlfriend)Spouse, partner, or companion (include ex-spouse, ex-partner, fiancé(e), boyfriend, girlfriend)	16	29.6%
2	Child (by blood or through marriage or adoption)Child (by blood or through marriage or adoption)	6	11.1%
3	Sibling (by blood or through marriage or adoption)Sibling (by blood or through marriage or adoption)	18	33.3%
4	Other relative (by blood or through marriage or adoption)Other relative (by blood or through marriage or adoption)	7	13%
5	Friend, neighbor, or someone known through family, friends, work, or community (e.g., church)Friend, neighbor, or someone known through family, friends, work, or community (e.g., church)	5	9.3%
6	Paid caregiver, health care provider, or clinician	2	3.7%

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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