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

16326

Study Description
Data Dictionary

Number of secondary items == 0 (loc_b4_calc_eq0)

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

Overview

Valid: 40

Mean: 28.32

var_std: 10.57

Range: -

Format: Numeric

Others

Notes

Calculated : sum( if([orient]=0 and [orient] != [memory],1,0) , if([judgment]=0 and [judgment] !=[memory],1,0) , if([commun]=0 and [commun] !=[memory],1,0) , if([homehobb]=0 and [homehobb] !=[memory],1,0) , if([perscare]=0 and [perscare]!=[memory],1,0) )

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