Clinical trials data
Stroop Color-Word Test in multiple sclerosis trials: 56 registered studies
Every registered multiple sclerosis 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 multiple sclerosis studies name it in an outcome measure
- 56
- Name it in a primary outcome, 36%
- 20 of 56
Tests named in the same studies
- 1
Symbol Coding38 studies, 18 as a primary outcome
- 2
Trail Making Test22 studies, 3 as a primary outcome
- 3
Paced Visual Serial Addition Test19 studies, 10 as a primary outcome
- 4
Verbal Learning19 studies, 8 as a primary outcome
- 5
Verbal Fluency18 studies, 5 as a primary outcome
- 6
Digit Span Test7 studies, 1 as a primary outcome
- 7
Selective Reminding Task7 studies, 1 as a primary outcome
- 8
Go/No-Go Task3 studies, 0 as a primary outcome
- 9
Continuous Performance Test2 studies, 1 as a primary outcome
- 10
N-Back Task2 studies, 1 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 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 3 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 3 | 1 |
| 2014 | 2 | 2 |
| 2015 | 1 | 1 |
| 2016 | 3 | 1 |
| 2017 | 1 | 0 |
| 2018 | 4 | 2 |
| 2019 | 3 | 2 |
| 2020 | 2 | 1 |
| 2021 | 3 | 1 |
| 2022 | 3 | 0 |
| 2023 | 8 | 2 |
| 2024 | 8 | 3 |
| 2025 | 2 | 0 |
| 2026 | 8 | 2 |
Phases and study sizes
By phase
- Phase 11 studies, 0 as a primary outcome
- Phase 1/21 studies, 1 as a primary outcome
- Phase 21 studies, 0 as a primary outcome
- Phase 2/32 studies, 1 as a primary outcome
- Phase 31 studies, 1 as a primary outcome
- Phase 41 studies, 0 as a primary outcome
- Not applicable41 studies, 14 as a primary outcome
- Observational8 studies, 3 as a primary outcome
Participants per study
- Not applicable60 median, 32 to 96
Show as a table
| Phase | Studies with a size | Median | Middle half |
|---|---|---|---|
| Not applicable | 39 | 60 | 32 to 96 |
When multiple sclerosis trials measure it
Latest time point of each outcome
- Within a day8 outcomes, 3 as a primary outcome
- Up to 4 weeks7 outcomes, 1 as a primary outcome
- 1 to 3 months13 outcomes, 4 as a primary outcome
- 3 to 6 months10 outcomes, 2 as a primary outcome
- 6 to 12 months3 outcomes, 2 as a primary outcome
- 1 to 2 years5 outcomes, 3 as a primary outcome
- Over 2 years3 outcomes, 1 as a primary outcome
- No duration given7 outcomes, 4 as a primary outcome
A test as a primary outcomeOnly in secondary or other outcomes
49 of the 56 outcome measures give a duration. A single visit counts as within a day.
Status, results, interventions and countries
Status
- Recruiting15 studies, 1 as a primary outcome
- Not yet recruiting6 studies, 2 as a primary outcome
- Completed21 studies, 12 as a primary outcome
- Stopped early5 studies, 1 as a primary outcome
- Status unknown9 studies, 4 as a primary outcome
What they test
- Behavioral12 studies, 4 as a primary outcome
- Drug7 studies, 3 as a primary outcome
- Device14 studies, 2 as a primary outcome
- Dietary supplement2 studies, 1 as a primary outcome
- Diagnostic test2 studies, 0 as a primary outcome
- Other17 studies, 9 as a primary outcome
- None given4 studies, 2 as a primary outcome
Intervention types as registered. A study can list several; observational studies often list none.
Where their sites are
- Italy11 studies, 4 as a primary outcome
- United States8 studies, 3 as a primary outcome
- France6 studies, 1 as a primary outcome
- Türkiye6 studies, 4 as a primary outcome
- Netherlands4 studies, 0 as a primary outcome
- Switzerland4 studies, 0 as a primary outcome
- Belgium3 studies, 3 as a primary outcome
- China2 studies, 0 as a primary outcome
- Portugal2 studies, 1 as a primary outcome
- Sweden2 studies, 1 as a primary outcome
- United Kingdom2 studies, 0 as a primary outcome
- Canada1 studies, 1 as a primary outcome
16 countries in all. A study with sites in several counts in each; 3 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 multiple sclerosis studies that name the Stroop Color-Word Test: 10 of 21, 48%
Every completed study with a cognitive outcome: 3,626 of 7,953, 46%
| Results | Completed multiple sclerosis studies that name the Stroop Color-Word Test | Every completed study |
|---|---|---|
| Results on ClinicalTrials.gov and a paper | 0, 0% | 776, 10% |
| Results on ClinicalTrials.gov only | 2, 10% | 1,139, 14% |
| A results paper only | 8, 38% | 1,711, 22% |
| Neither | 11, 52% | 4,327, 54% |
The 56 studies
56 studies match. 20 name the Stroop Color-Word Test in a primary outcome. Median size 62 participants. Median time to the primary outcome: 4 months.
Loading 56 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 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 3 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 3 | 1 |
| 2014 | 2 | 2 |
| 2015 | 1 | 1 |
| 2016 | 3 | 1 |
| 2017 | 1 | 0 |
| 2018 | 4 | 2 |
| 2019 | 3 | 2 |
| 2020 | 2 | 1 |
| 2021 | 3 | 1 |
| 2022 | 3 | 0 |
| 2023 | 8 | 2 |
| 2024 | 8 | 3 |
| 2025 | 2 | 0 |
| 2026 | 8 | 2 |
Library tests named most
Conditions
Phases
Participants
Lead sponsor: industry 3, other 53. Interventional 48, observational 8.
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 |
|---|---|---|---|---|---|---|---|
| NCT07842302 | Start2026 | PhaseNot applicable | ConditionsMultiple sclerosis, Pain and fatigue | Participants80 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07759115 | Start2026 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants64 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07734675 | Start2026 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants130 | Lead sponsorOther | StatusNot yet recruiting | 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
|
| NCT07546721 | Start2026 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants12 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07536503 | Start2026 | PhaseObservational | ConditionsMultiple sclerosis, Sleep and sleep disorders | Participants80 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07452562 | Start2026 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants60 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07434934 | Start2026 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants40 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07225868 | Start2025 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants126 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07087873 | Start2025 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants128 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06968039 | Start2024 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants85 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06820125 | Start2023 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants48 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06721416 | Start2024 | PhaseNot applicable | ConditionsMultiple sclerosis, Pain and fatigue | Participants12 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT06672770 | Start2024 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants63 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT06592352 | Start2024 | PhasePhase 2 | ConditionsMultiple sclerosis | Participants64 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06526364 | Start2024 | PhaseObservational | ConditionsMultiple sclerosis | Participants100 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06462339 | Start2024 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants28 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT06312046 | Start2024 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants90 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06303024 | Start2023 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants140 | Lead sponsorOther | StatusStatus unknown | Library tests named
|
| NCT06112639 | Start2024 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Mild cognitive impairment, Multiple sclerosis, Cancer | Participants192 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06062693 | Start2023 | PhaseNot applicable | ConditionsStroke, Parkinson's disease, Multiple sclerosis | Participants160 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT05983809 | Start2023 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants24 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT05811013 | Start2023 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants40 | Lead sponsorOther | StatusStatus unknown | Library tests named
|
| NCT05792176 | Start2023 | PhaseNot applicable | ConditionsMultiple sclerosis | Participants29 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT05787704 | Start2023 | PhaseObservational | ConditionsMultiple sclerosis, Aging, frailty and exercise | Participants41 | Lead sponsorOther | StatusCompleted | Library tests named
|
Questions, answered from the data
How many multiple sclerosis trials use the Stroop Color-Word Test?
56 registered multiple sclerosis studies on ClinicalTrials.gov name it in an outcome measure, 20 of them in a primary outcome: 9% of the condition's 612 studies with a cognitive outcome, against 12% of all of them. It is the 5th most named test in multiple sclerosis trials.
Which tests do multiple sclerosis trials use with the Stroop Color-Word Test?
Symbol Coding (38 studies), the Trail Making Test (22 studies) and the Paced Visual Serial Addition Test (19 studies).
When do multiple sclerosis trials measure the Stroop Color-Word Test?
Half of the primary outcomes that name the Stroop Color-Word Test are measured within 4 months of the start, and the middle half from 6 weeks to 15 months. 16 primary outcomes give a duration.
How many completed multiple sclerosis trials that use the Stroop Color-Word Test have reported results?
10 of the 21 completed studies that name it, 48%, have reported results: 2 posted them on ClinicalTrials.gov, 8 have a results paper linked to the registry record, and 0 did both. The other 11 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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