Home / Central Data Catalog / USDV4 / variable [headinjcon]
central

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
11884

4h2. After a head injury, what was the longest period that the participant was "dazed or confused" or unable to recall details of the injury? (headinjcon)

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

Overview

Valid: 58
Range: -
Format:

Questions and instructions

Question pretext
[headinjury]='1'
Categories
Value Category Cases
0 Less than 5 minutes 14
24.1%
1 5 minutes to less than 30 minutes 2
3.4%
2 30 minutes to less than 24 hours 11
19%
3 1 day to less than 7 days 0
0%
4 7 days or more 13
22.4%
8 Not applicable, never dazed and confused 6
10.3%
9 Unknown duration 12
20.7%
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.
Back to Catalog