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

14520

1a1. Mother -- birth year (momyob)

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

Overview

Valid: 60

Mean: 80.65

var_std: 9.14

Range: -

Format: Numeric

Others

Notes

Field Note : [loc_6666_choice_instr:hideunderscore] 9999=unknown

Back to Catalog