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

16328

Memory Diff - Secondary Scores==1 (loc_b4_calc_1diff)

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

Overview

Valid: 55

Mean: 3.25

var_std: 1.09

Range: -

Format: Numeric

Others

Notes

Calculated : if( [loc_b4_calc_eq1] > 1, abs(1 - [memory]), '' )

Back to Catalog