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

15634

3k1. Child 11 -- Birth year (YYYY) (kid11yob)

Valid: 55

Mean: 4.27

var_std: 0.16

Range: -

Format: Numeric

Question pretext

[kids]>10 and [kids]<>""

Notes

Field Note : [loc_666_choice_instr:hideunderscore] 9999 = Unknown

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