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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
15979

1c. Average number of packs smoked per day (packsper)

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

Overview

Valid: 54
Range: -
Format:

Questions and instructions

Question pretext
[tobac100]='1'
Categories
Value Category Cases
1 1 cigarette to less than 1/2 pack 3
5.6%
2 1/2 pack to less than 1 pack 8
14.8%
3 1 pack to less than 1 1/2 packs 14
25.9%
4 1 1/2 packs to less than 2 packs 12
22.2%
5 2 packs or more 7
13%
9 Unknown 10
18.5%
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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