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
Created on
Jul 02, 2026
Last modified
Jul 07, 2026
Page views
12994
(C2 Q5a/C2T Q4a) Number of correct trials (digforct)
Data file: UDSv4TemplateForXMLD_2026-04-14_0731.REDCap.xml
Overview
Valid:
60
Range:
-
Format:
Questions and instructions
Question pretext
[loc_c2_or_c2t]<>''
Categories
| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 4 |
6.7%
|
| 1 | 1 | 7 |
11.7%
|
| 2 | 2 | 2 |
3.3%
|
| 3 | 3 | 3 |
5%
|
| 4 | 4 | 4 |
6.7%
|
| 5 | 5 | 1 |
1.7%
|
| 6 | 6 | 1 |
1.7%
|
| 7 | 7 | 5 |
8.3%
|
| 8 | 8 | 7 |
11.7%
|
| 9 | 9 | 0 |
0%
|
| 10 | 10 | 3 |
5%
|
| 11 | 11 | 3 |
5%
|
| 12 | 12 | 0 |
0%
|
| 13 | 13 | 5 |
8.3%
|
| 14 | 14 | 4 |
6.7%
|
| 95 | 95 = Physical problem | 0 |
0%
|
| 96 | 96 = Cognitive/behavior problem | 3 |
5%
|
| 97 | 97 = Other problem | 3 |
5%
|
| 98 | 98 = Verbal refusal | 5 |
8.3%
|
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.
Others
Notes
Field Note : (0-14, 95-98)