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
13280
(C2 Q10c/C2T Q11c) Delay time (minutes) (craftdti)
Data file: UDSv4TemplateForXMLD_2026-04-14_0731.REDCap.xml
Overview
Valid:
58
Range:
-
Format:
Questions and instructions
Question pretext
[craftdvr]<45 and [craftdvr]<>""
Categories
| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 0 |
0%
|
| 1 | 1 | 0 |
0%
|
| 2 | 2 | 0 |
0%
|
| 3 | 3 | 0 |
0%
|
| 4 | 4 | 0 |
0%
|
| 5 | 5 | 0 |
0%
|
| 6 | 6 | 0 |
0%
|
| 7 | 7 | 0 |
0%
|
| 8 | 8 | 0 |
0%
|
| 9 | 9 | 1 |
1.7%
|
| 10 | 10 | 0 |
0%
|
| 11 | 11 | 0 |
0%
|
| 12 | 12 | 0 |
0%
|
| 13 | 13 | 0 |
0%
|
| 14 | 14 | 0 |
0%
|
| 15 | 15 | 0 |
0%
|
| 16 | 16 | 0 |
0%
|
| 17 | 17 | 0 |
0%
|
| 18 | 18 | 0 |
0%
|
| 19 | 19 | 0 |
0%
|
| 20 | 20 | 0 |
0%
|
| 21 | 21 | 28 |
48.3%
|
| 22 | 22 | 0 |
0%
|
| 23 | 23 | 0 |
0%
|
| 24 | 24 | 0 |
0%
|
| 25 | 25 | 0 |
0%
|
| 26 | 26 | 0 |
0%
|
| 27 | 27 | 0 |
0%
|
| 28 | 28 | 0 |
0%
|
| 29 | 29 | 0 |
0%
|
| 30 | 30 | 0 |
0%
|
| 31 | 31 | 0 |
0%
|
| 32 | 32 | 0 |
0%
|
| 33 | 33 | 0 |
0%
|
| 34 | 34 | 0 |
0%
|
| 35 | 35 | 0 |
0%
|
| 36 | 36 | 0 |
0%
|
| 37 | 37 | 0 |
0%
|
| 38 | 38 | 0 |
0%
|
| 39 | 39 | 0 |
0%
|
| 40 | 40 | 0 |
0%
|
| 41 | 41 | 0 |
0%
|
| 42 | 42 | 0 |
0%
|
| 43 | 43 | 0 |
0%
|
| 44 | 44 | 0 |
0%
|
| 45 | 45 | 0 |
0%
|
| 46 | 46 | 0 |
0%
|
| 47 | 47 | 0 |
0%
|
| 48 | 48 | 0 |
0%
|
| 49 | 49 | 0 |
0%
|
| 50 | 50 | 13 |
22.4%
|
| 51 | 51 | 0 |
0%
|
| 52 | 52 | 0 |
0%
|
| 53 | 53 | 0 |
0%
|
| 54 | 54 | 0 |
0%
|
| 55 | 55 | 0 |
0%
|
| 56 | 56 | 0 |
0%
|
| 57 | 57 | 0 |
0%
|
| 58 | 58 | 0 |
0%
|
| 59 | 59 | 0 |
0%
|
| 60 | 60 | 0 |
0%
|
| 61 | 61 | 0 |
0%
|
| 62 | 62 | 0 |
0%
|
| 63 | 63 | 0 |
0%
|
| 64 | 64 | 0 |
0%
|
| 65 | 65 | 0 |
0%
|
| 66 | 66 | 0 |
0%
|
| 67 | 67 | 0 |
0%
|
| 68 | 68 | 0 |
0%
|
| 69 | 69 | 0 |
0%
|
| 70 | 70 | 0 |
0%
|
| 71 | 71 | 0 |
0%
|
| 72 | 72 | 0 |
0%
|
| 73 | 73 | 0 |
0%
|
| 74 | 74 | 0 |
0%
|
| 75 | 75 | 0 |
0%
|
| 76 | 76 | 0 |
0%
|
| 77 | 77 | 0 |
0%
|
| 78 | 78 | 0 |
0%
|
| 79 | 79 | 0 |
0%
|
| 80 | 80 | 0 |
0%
|
| 81 | 81 | 0 |
0%
|
| 82 | 82 | 0 |
0%
|
| 83 | 83 | 0 |
0%
|
| 84 | 84 | 0 |
0%
|
| 85 | 85 | 16 |
27.6%
|
| 99 | 99 = Unknown | 0 |
0%
|
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 : (0-85 minutes 99=Unknown)