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

14710

Sum of D1a Diagnoses 15-17 marked as primary (loc_d1b_diagset3)

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

Overview

Valid: 53

Mean: 39.52

var_std: 0.21

Range: -

Format: Numeric

Others

Notes

Calculated : sum([loc_cvdif],[loc_msaif],[loc_cteif])

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