Home / Central Data Catalog / USDV4 / variable [UDSv4Template]
central

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
12774

ADRC Visit Number (visitnum)

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

Overview

Valid: 58
Range: -
Format: character

Others

Notes
Field Note : The Center may use its existing visit number scheme. It is not required to start with 1. If submitting a UDSv4 initial visit packet or a follow-up visit packet for an existing participant, please continue with the next sequential visit number for this participant; do not restart visit numbers.
Back to Catalog