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NCT04560400 · ClinicalTrials.gov registry record · NA
Reverse King-Devick Test and History of Multiple Concussions
A NA study, sponsored by Indiana University.
- Completed
- Registry status
- NA
- Development phase
- 71
- Enrollment target
NCT04560400: Completed NA study, sponsored by Indiana University.
NCT04560400 is a NA study that has completed, run by Indiana University. The registered enrollment target is 71 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (95% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT04560400, a NA study, has completed, sponsored by Indiana University.
- COMPLETED
- Registry status
- NA
- Development phase
- 71 participants
- Enrollment target
Study Summary
The purpose of this study is to examine the effects of concussion history and reading direction on baseline King- Devick Test (KDT) performance, a common component of sideline concussion assessments. The KDT is a timed assessment of saccades, or quick movements of the eyes between two points. This test is a form of rapid automatized naming and involved subjects reading digits arranged on a tablet screen as quickly and accurately as possible. The test has three progressively more challenging test "cards," as the horizontal guidelines between digits disappear from test card 1 to 2, and the vertical spacing between the lines of digits decreases from test card 2 to 3. KDT performance is evaluated in terms of both speed (duration to all three test cards) and the number of errors (digits read incorrectly or omitted). Previous studies have identified several factors that affect KDT performance aside from head injury, including age, sex, sleep deprivation, learning disabilities, and first languages other than English. History of concussion has not been shown to influence KDT performance. The investigators hypothesize that since the left-to-right (L-R) reading direction of the KDT is the same way in which to read English, the long-term effects of prior concussions on saccadic eye movements may be masked. The investigators want to answer the following three research questions: 1) What is the effect of KDT reading direction on baseline KDT performance? If the test is performed by reading digits in a right-to-left (R-L) direction, will KDT times be slower and the number of errors increase relative to a typical L-R KDT? 2) What is the effect of a history of multiple concussions on KDT performance relative to no history of concussion? 3) Is the R-L KDT more sensitive to a history of multiple concussions? The investigators hypothesize that individuals with a history of multiple concussions will perform significantly worse (longer test durations, more errors) than individuals with
Primary Outcome
The comparison in King-Devick test speed (in second) between conventional reading direction of King-Devick test and reverse direction of King-Devick test will be made in each group (multiple concussion history, single concussion history, and no concussion history).
Interventions
- DIAGNOSTIC_TEST Conventional King-Devick test
- DIAGNOSTIC_TEST Reverse King-Devick test
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 71 participants |
| Start Date | 2020-09-20 |
| Est. Completion | 2022-05-01 |
| Phase | NA |
What the finished NCT04560400 record still lists
NCT04560400 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 71 participants, a relatively small participant target, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (95% lower).
The record links to 0 conditions, and to 2 interventions - of which Conventional King-Devick test is the first listed.
NCT04560400 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT04560400 about?
NCT04560400 is a clinical study titled "Reverse King-Devick Test and History of Multiple Concussions". The purpose of this study is to examine the effects of concussion history and reading direction on baseline King- Devick Test (KDT) performance, a common component of sideline concussion assessments. The KDT is a timed assessment of saccades, or quick movements of the eyes between two points. This t...
What is the current status of trial NCT04560400?
This trial is currently completed. It is a NA study. The enrollment target is 71 participants. The study started on 2020-09-20. Estimated completion is 2022-05-01.
What interventions are being tested in trial NCT04560400?
The interventions under investigation include: Conventional King-Devick test (DIAGNOSTIC_TEST), Reverse King-Devick test (DIAGNOSTIC_TEST).
Who is sponsoring clinical trial NCT04560400?
This trial is sponsored by Indiana University, which has 890 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT04560400's enrollment target sits among peer trials
71 1102nd of 2000 higher than 898 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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