Clinical trials data
Stroop Color-Word Test in stroke trials: 105 registered studies
Every registered stroke study on ClinicalTrials.gov that names the Stroop Color-Word Test in an outcome measure: how often it is a primary outcome, the tests named with it, how large the studies are and when they measure it.
- Registered stroke studies name it in an outcome measure
- 105
- Name it in a primary outcome, 28%
- 29 of 105
Tests named in the same studies
- 1
Trail Making Test48 studies, 17 as a primary outcome
- 2
Digit Span Test36 studies, 11 as a primary outcome
- 3
Verbal Fluency25 studies, 7 as a primary outcome
- 4
Verbal Learning17 studies, 3 as a primary outcome
- 5
Symbol Coding13 studies, 4 as a primary outcome
- 6
Category Fluency9 studies, 3 as a primary outcome
- 7
Cancellation Test8 studies, 2 as a primary outcome
- 8
Corsi Block-Tapping Test8 studies, 2 as a primary outcome
- 9
N-Back Task6 studies, 3 as a primary outcome
- 10
Picture Naming Test6 studies, 2 as a primary outcome
A test as a primary outcomeOnly in secondary or other outcomes
Studies by start year
A test as a primary outcomeOnly in secondary or other outcomes
Show as a table
| Start year | Studies | A test as a primary outcome |
|---|---|---|
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 2 | 1 |
| 2011 | 3 | 0 |
| 2012 | 2 | 0 |
| 2013 | 3 | 0 |
| 2014 | 6 | 2 |
| 2015 | 2 | 1 |
| 2016 | 3 | 1 |
| 2017 | 3 | 0 |
| 2018 | 9 | 3 |
| 2019 | 3 | 1 |
| 2020 | 5 | 3 |
| 2021 | 4 | 2 |
| 2022 | 12 | 2 |
| 2023 | 12 | 2 |
| 2024 | 7 | 3 |
| 2025 | 19 | 5 |
| 2026 | 9 | 3 |
Phases and study sizes
By phase
- Phase 2/31 studies, 0 as a primary outcome
- Phase 31 studies, 0 as a primary outcome
- Phase 42 studies, 0 as a primary outcome
- Not applicable88 studies, 28 as a primary outcome
- Observational13 studies, 1 as a primary outcome
Participants per study
- Not applicable46 median, 30 to 101
- Observational100 median, 66 to 250
Show as a table
| Phase | Studies with a size | Median | Middle half |
|---|---|---|---|
| Not applicable | 88 | 46 | 30 to 101 |
| Observational | 13 | 100 | 66 to 250 |
When stroke trials measure it
Latest time point of each outcome
- Within a day13 outcomes, 5 as a primary outcome
- Up to 4 weeks26 outcomes, 7 as a primary outcome
- 1 to 3 months29 outcomes, 8 as a primary outcome
- 3 to 6 months15 outcomes, 5 as a primary outcome
- 6 to 12 months11 outcomes, 4 as a primary outcome
- 1 to 2 years5 outcomes, 0 as a primary outcome
- Over 2 years2 outcomes, 0 as a primary outcome
- No duration given4 outcomes, 0 as a primary outcome
A test as a primary outcomeOnly in secondary or other outcomes
101 of the 105 outcome measures give a duration. A single visit counts as within a day.
Status, results, interventions and countries
Status
- Recruiting24 studies, 7 as a primary outcome
- Not yet recruiting8 studies, 2 as a primary outcome
- Active, not recruiting3 studies, 1 as a primary outcome
- Completed39 studies, 11 as a primary outcome
- Stopped early6 studies, 0 as a primary outcome
- Status unknown25 studies, 8 as a primary outcome
What they test
- Behavioral36 studies, 9 as a primary outcome
- Drug6 studies, 0 as a primary outcome
- Device27 studies, 9 as a primary outcome
- Dietary supplement2 studies, 1 as a primary outcome
- Procedure5 studies, 0 as a primary outcome
- Diagnostic test3 studies, 0 as a primary outcome
- Combination product1 studies, 0 as a primary outcome
- Other43 studies, 14 as a primary outcome
- None given4 studies, 0 as a primary outcome
Intervention types as registered. A study can list several; observational studies often list none.
Where their sites are
- Taiwan24 studies, 14 as a primary outcome
- Italy10 studies, 2 as a primary outcome
- Switzerland8 studies, 1 as a primary outcome
- United States7 studies, 1 as a primary outcome
- Canada5 studies, 0 as a primary outcome
- Hong Kong5 studies, 2 as a primary outcome
- France4 studies, 0 as a primary outcome
- Netherlands4 studies, 1 as a primary outcome
- South Korea4 studies, 0 as a primary outcome
- Spain4 studies, 2 as a primary outcome
- Türkiye4 studies, 0 as a primary outcome
- China3 studies, 0 as a primary outcome
27 countries in all. A study with sites in several counts in each; 5 list no site.
Reported results
Completed studies with results posted on ClinicalTrials.gov, a results paper the registry links to the study, or both.
Completed stroke studies that name the Stroop Color-Word Test: 13 of 39, 33%
Every completed study with a cognitive outcome: 3,626 of 7,953, 46%
| Results | Completed stroke studies that name the Stroop Color-Word Test | Every completed study |
|---|---|---|
| Results on ClinicalTrials.gov and a paper | 1, 3% | 776, 10% |
| Results on ClinicalTrials.gov only | 1, 3% | 1,139, 14% |
| A results paper only | 11, 28% | 1,711, 22% |
| Neither | 26, 67% | 4,327, 54% |
The 105 studies
105 studies match. 29 name the Stroop Color-Word Test in a primary outcome. Median size 60 participants. Median time to the primary outcome: 12 weeks.
Loading 105 studies; the filters turn on when they arrive.
2026 is partly planned starts.
Show as a table
| Start year | Studies | As a primary outcome |
|---|---|---|
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 2 | 1 |
| 2011 | 3 | 0 |
| 2012 | 2 | 0 |
| 2013 | 3 | 0 |
| 2014 | 6 | 2 |
| 2015 | 2 | 1 |
| 2016 | 3 | 1 |
| 2017 | 3 | 0 |
| 2018 | 9 | 3 |
| 2019 | 3 | 1 |
| 2020 | 5 | 3 |
| 2021 | 4 | 2 |
| 2022 | 12 | 2 |
| 2023 | 12 | 2 |
| 2024 | 7 | 3 |
| 2025 | 19 | 5 |
| 2026 | 9 | 3 |
Library tests named most
Largest condition groups
Phases
Participants
Lead sponsor: industry 1, other 104. Interventional 92, observational 13.
As a primary outcomeSecondary or other outcomeThe Stroop Color-Word Test
The studies, newest registration first
Each number opens the study's record on ClinicalTrials.gov.
| Study | Start | Phase | Conditions | Participants | Lead sponsor | Status | Library tests named, with the latest time point |
|---|---|---|---|---|---|---|---|
| NCT07887776 | Start2025 | PhaseObservational | ConditionsStroke | Participants66 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07865260 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Stroke, Parkinson's disease | Participants80 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07759791 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants118 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07668245 | Start2026 | PhaseNot applicable | ConditionsStroke | Participants46 | Lead sponsorOther | StatusActive, not recruiting | Library tests named
|
| NCT07636538 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Stroke, Parkinson's disease | Participants30 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07624630 | Start2026 | PhaseObservational | ConditionsStroke, Aging, frailty and exercise | Participants50 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07616050 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Stroke, Parkinson's disease, Multiple sclerosis, Aging, frailty and exercise | Participants70 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07588997 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants18 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07522463 | Start2026 | PhaseNot applicable | ConditionsStroke | Participants44 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07504276 | Start2026 | PhaseNot applicable | ConditionsStroke | Participants32 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07427511 | Start2026 | PhaseNot applicable | ConditionsStroke | Participants120 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07396025 | Start2025 | PhaseNot applicable | ConditionsStroke, Cardiovascular disease | Participants60 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07345481 | Start2026 | PhaseObservational | ConditionsStroke, Brain injury and concussion | Participants40 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07322614 | Start2021 | PhaseNot applicable | ConditionsStroke | Participants60 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07281313 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants120 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07252544 | Start2025 | PhasePhase 3 | ConditionsStroke | Participants3,156 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07236216 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants60 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07200661 | Start2024 | PhaseNot applicable | ConditionsStroke, Cardiovascular disease | Participants30 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07144930 | Start2025 | PhaseNot applicable | ConditionsStroke, Healthy volunteers | Participants210 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07119827 | Start2025 | PhaseObservational | ConditionsStroke, Brain injury and concussion | Participants250 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07116187 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants100 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07055945 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants38 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06979050 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants80 | Lead sponsorOther | StatusActive, not recruiting | Library tests named
|
| NCT06922409 | Start2025 | PhaseNot applicable | ConditionsStroke, Depression and bipolar disorder, Sleep and sleep disorders, Pain and fatigue | Participants45 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06852209 | Start2025 | PhaseNot applicable | ConditionsStroke | Participants20 | Lead sponsorOther | StatusRecruiting | Library tests named
|
Questions, answered from the data
How many stroke trials use the Stroop Color-Word Test?
105 registered stroke studies on ClinicalTrials.gov name it in an outcome measure, 29 of them in a primary outcome: 9% of the condition's 1,233 studies with a cognitive outcome, against 12% of all of them. It is the 3rd most named test in stroke trials.
Which tests do stroke trials use with the Stroop Color-Word Test?
The Trail Making Test (48 studies), the Digit Span Test (36 studies) and Verbal Fluency (25 studies).
When do stroke trials measure the Stroop Color-Word Test?
Half of the primary outcomes that name the Stroop Color-Word Test are measured within 12 weeks of the start, and the middle half from 4 weeks to 4 months. 29 primary outcomes give a duration.
How many completed stroke trials that use the Stroop Color-Word Test have reported results?
13 of the 39 completed studies that name it, 33%, have reported results: 2 posted them on ClinicalTrials.gov, 12 have a results paper linked to the registry record, and 1 did both. The other 26 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.
How the studies are counted
For each test family, the census runs ClinicalTrials.gov's own outcome search for the family's names and reads every study first posted by the day the family was counted. These studies were read on 10 November 2026. A study counts once on a page, however many tests it names. Counts for a test cover every version of the task under any of its names, so a page can count studies that used a commercial version.
The census adds two things to each record and changes nothing in it: which outcome list names the test (primary, then secondary, then other), and the condition groups, matched on the study's condition names and MeSH terms. A study can fall in several groups; one whose only condition is cognitive impairment or decline falls in “Cognitive impairment and decline”. Studies that name only instruments outside the library count in every total and share but are not listed.
A second read on 10 November 2026 added each study's overall status, whether results are posted, its intervention types, the countries of its sites and the time frame of the outcome that names each test. A time frame counts by the latest time point it names: “Baseline, 12 and 24 weeks” is 24 weeks, a single visit is within a day, and one that names no duration, such as “end of treatment”, is left out of the timings.
A third read on 10 November 2026 added the papers the registry links to each study: those its sponsor lists as reporting results, and those PubMed links to it through the study's NCT number. A study has a results paper when one of them came out in or after the month of its primary completion and PubMed does not class it as a protocol, review or comment. A paper that never gives the NCT number is not linked, so some studies counted as reporting neither did publish.
Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine, which does not endorse these pages. Every study line is in the data release 2.1.0, and the explorer's own file is clinical-trials-studies.json.
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