Uniform Data Set version 4
UDSv4 - Template

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

15284

D1a Sum of questions 5a1 - 5a4 (loc_impnomci_sum)

Valid: 50

Mean: 6.69

var_std: 0.03

Range: -

Format: Numeric

Notes

Calculated : if([impnomci]<>'', sum([impnomcifu],[impnomcicg],[impnomclcd],[impnomcio]),'')

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