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

16004

6. Which of these income groups represents your household income for the past year? Include income from all sources such as wages, salaries, social security or retirement benefits, help from relatives, rent from property, and so forth. This information wi (incomeyr)

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

Overview

Valid: 54

Range: -

Format:

Questions and instructions

Question pretext

[modea1a] <> '0'

Categories

Value	Category	Cases
1	$0 - $14,999	12	22.2%
2	$15,000 - $29,999	5	9.3%
3	$30,000 - $74,999	9	16.7%
4	$75,000 and over	3	5.6%
8	Prefer not to answer	17	31.5%
9	Don't know	8	14.8%

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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