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

12297

Study Description
Data Dictionary

(C2 Q1t/C2T Q1k) Delayed recall -- No cue (mocarecn)

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

Overview

Valid: 57

Range: -

Format:

Questions and instructions

Question pretext

[mocacomp]='1'

Categories

Value	Category	Cases
0	0	11	19.3%
1	1	2	3.5%
2	2	2	3.5%
3	3	10	17.5%
4	4	2	3.5%
5	5	10	17.5%
95	95 = Physical problem	11	19.3%
96	96 = Cognitive/behavior problem	1	1.8%
97	97 = Other problem	2	3.5%
98	98 = Verbal refusal	6	10.5%

Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.

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