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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
12404

IVP Q4a1./FVP Q5a1. What is the approximate frequency of all types of contact? (incntfrq)

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

Overview

Valid: 57
Range: -
Format:

Questions and instructions

Question pretext
[inlivwth] = '0'
Categories
Value Category Cases
1 Daily 13
22.8%
2 At least three times per week 13
22.8%
3 Weekly 4
7%
4 At least three times per month 13
22.8%
5 Monthly 9
15.8%
6 Less than once a month 5
8.8%
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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