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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
12192

2b5. Sibling 2 -- Method of evaluation (sib2meval)

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

Overview

Valid: 55
Range: -
Format:

Questions and instructions

Question pretext
[sibs]>1 and [sibs]<>"" and [sibs]<77
Categories
Value Category Cases
1 Participant /family report 12
21.8%
2 Medical records 6
10.9%
3 Exam (co-enrolled family members) 17
30.9%
4 Autopsy (if autopsy report available) 3
5.5%
6 Provided at previous visit 17
30.9%
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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