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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
11799

12r1. Record substance(s) involved: (loc_subuse)

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

Overview

Valid: 59
Range: -
Format:

Questions and instructions

Question pretext
[besubab] = 1
Categories
Value Category Cases
a Alcohol 15
25.4%
b Sedative/hypnotic 4
6.8%
c Opiate 19
32.2%
d Cocaine 5
8.5%
e Cannabis 5
8.5%
f Other 11
18.6%
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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