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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
12214

2c5. Sibling 3 -- Method of evaluation (sib3meval)

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

Overview

Valid: 54
Range: -
Format:

Questions and instructions

Question pretext
[sibs]>2 and [sibs]<>"" and [sibs]<77
Categories
Value Category Cases
1 Participant /family report 11
20.4%
2 Medical records 7
13%
3 Exam (co-enrolled family members) 4
7.4%
4 Autopsy (if autopsy report available) 15
27.8%
6 Provided at previous visit 17
31.5%
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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