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

13446

8. Do you often feel helpless? (loc_helpless)

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

Overview

Valid: 53

Mean: 35.44

var_std: 3.01

Range: -

Format: Numeric

Others

Notes

Calculated : if([helpless]<>"", if([helpless] = 9, 0, [helpless]), "")

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