Clinical trials data
Stroop Color-Word Test in mild cognitive impairment trials: 126 registered studies
Every registered mild cognitive impairment 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 mild cognitive impairment studies name it in an outcome measure
- 126
- Name it in a primary outcome, 40%
- 50 of 126
Tests named in the same studies
- 1
Trail Making Test64 studies, 22 as a primary outcome
- 2
Verbal Fluency48 studies, 13 as a primary outcome
- 3
Digit Span Test39 studies, 13 as a primary outcome
- 4
Verbal Learning35 studies, 15 as a primary outcome
- 5
Symbol Coding18 studies, 6 as a primary outcome
- 6
Category Fluency15 studies, 4 as a primary outcome
- 7
Complex Figure Copy and Recall13 studies, 4 as a primary outcome
- 8
Picture Naming Test13 studies, 4 as a primary outcome
- 9
Short Story Recall12 studies, 6 as a primary outcome
- 10
Matrix Reasoning9 studies, 3 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 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 3 | 2 |
| 2011 | 5 | 0 |
| 2012 | 3 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 2 | 1 |
| 2016 | 5 | 2 |
| 2017 | 1 | 0 |
| 2018 | 9 | 5 |
| 2019 | 5 | 2 |
| 2020 | 9 | 3 |
| 2021 | 12 | 7 |
| 2022 | 14 | 7 |
| 2023 | 8 | 4 |
| 2024 | 14 | 5 |
| 2025 | 14 | 4 |
| 2026 | 18 | 5 |
Phases and study sizes
By phase
- Early phase 11 studies, 1 as a primary outcome
- Phase 12 studies, 0 as a primary outcome
- Phase 1/21 studies, 1 as a primary outcome
- Phase 25 studies, 2 as a primary outcome
- Phase 44 studies, 2 as a primary outcome
- Not applicable102 studies, 42 as a primary outcome
- Observational11 studies, 2 as a primary outcome
Participants per study
- Not applicable60 median, 40 to 120
- Observational165 median, 89 to 248
Show as a table
| Phase | Studies with a size | Median | Middle half |
|---|---|---|---|
| Not applicable | 102 | 60 | 40 to 120 |
| Observational | 10 | 165 | 89 to 248 |
When mild cognitive impairment trials measure it
Latest time point of each outcome
- Within a day8 outcomes, 2 as a primary outcome
- Up to 4 weeks9 outcomes, 5 as a primary outcome
- 1 to 3 months42 outcomes, 21 as a primary outcome
- 3 to 6 months26 outcomes, 6 as a primary outcome
- 6 to 12 months22 outcomes, 7 as a primary outcome
- 1 to 2 years8 outcomes, 4 as a primary outcome
- Over 2 years4 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
119 of the 126 outcome measures give a duration. A single visit counts as within a day.
Status, results, interventions and countries
Status
- Recruiting26 studies, 8 as a primary outcome
- Not yet recruiting13 studies, 3 as a primary outcome
- Active, not recruiting3 studies, 2 as a primary outcome
- Completed48 studies, 21 as a primary outcome
- Stopped early1 studies, 1 as a primary outcome
- Status unknown35 studies, 15 as a primary outcome
What they test
- Behavioral54 studies, 25 as a primary outcome
- Drug12 studies, 6 as a primary outcome
- Device34 studies, 10 as a primary outcome
- Dietary supplement9 studies, 1 as a primary outcome
- Procedure1 studies, 0 as a primary outcome
- Diagnostic test2 studies, 0 as a primary outcome
- Other28 studies, 10 as a primary outcome
- None given3 studies, 1 as a primary outcome
Intervention types as registered. A study can list several; observational studies often list none.
Where their sites are
- United States25 studies, 12 as a primary outcome
- Italy19 studies, 3 as a primary outcome
- Taiwan13 studies, 10 as a primary outcome
- Hong Kong8 studies, 1 as a primary outcome
- Canada7 studies, 1 as a primary outcome
- South Korea7 studies, 3 as a primary outcome
- China6 studies, 4 as a primary outcome
- France3 studies, 1 as a primary outcome
- Singapore3 studies, 1 as a primary outcome
- Spain3 studies, 1 as a primary outcome
- Switzerland3 studies, 0 as a primary outcome
- Türkiye3 studies, 1 as a primary outcome
26 countries in all. A study with sites in several counts in each; 10 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 mild cognitive impairment studies that name the Stroop Color-Word Test: 19 of 48, 40%
Every completed study with a cognitive outcome: 3,626 of 7,953, 46%
| Results | Completed mild cognitive impairment studies that name the Stroop Color-Word Test | Every completed study |
|---|---|---|
| Results on ClinicalTrials.gov and a paper | 5, 10% | 776, 10% |
| Results on ClinicalTrials.gov only | 3, 6% | 1,139, 14% |
| A results paper only | 11, 23% | 1,711, 22% |
| Neither | 29, 60% | 4,327, 54% |
The 126 studies
126 studies match. 50 name the Stroop Color-Word Test in a primary outcome. Median size 60 participants. Median time to the primary outcome: 13 weeks.
Loading 126 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 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 3 | 2 |
| 2011 | 5 | 0 |
| 2012 | 3 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 2 | 1 |
| 2016 | 5 | 2 |
| 2017 | 1 | 0 |
| 2018 | 9 | 5 |
| 2019 | 5 | 2 |
| 2020 | 9 | 3 |
| 2021 | 12 | 7 |
| 2022 | 14 | 7 |
| 2023 | 8 | 4 |
| 2024 | 14 | 5 |
| 2025 | 14 | 4 |
| 2026 | 18 | 5 |
Library tests named most
Largest condition groups
Phases
Participants
Lead sponsor: industry 5, other 121. Interventional 115, observational 11.
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 |
|---|---|---|---|---|---|---|---|
| NCT07865260 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Stroke, Parkinson's disease | Participants80 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07735910 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Depression and bipolar disorder, Sleep and sleep disorders, Anxiety, PTSD and OCD | Participants60 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07731334 | Start2026 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Mild cognitive impairment | Participants384 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07652775 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Depression and bipolar disorder | Participants45 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07646054 | Start2026 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Mild cognitive impairment | Participants1,200 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07642518 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Obesity and diabetes | Participants38 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07636538 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Stroke, Parkinson's disease | Participants30 | 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
|
| NCT07608510 | Start2026 | PhaseObservational | ConditionsMild cognitive impairment | Participants150 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07554144 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment | Participants28 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07533084 | Start2026 | PhaseObservational | ConditionsDementia and Alzheimer's, Mild cognitive impairment, Aging, frailty and exercise | Participants265 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07517380 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment | Participants40 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07497334 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment, Aging, frailty and exercise | Participants45 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07424365 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment, Parkinson's disease, Healthy volunteers | Participants80 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07411365 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Parkinson's disease | Participants42 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07376135 | Start2026 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Mild cognitive impairment | Participants300 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07364019 | Start2026 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Mild cognitive impairment | Participants700 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07353359 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment | Participants65 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07334392 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment | Participants45 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07321821 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment | Participants60 | Lead sponsorOther | StatusActive, not recruiting | Library tests named
|
| NCT07149038 | Start2025 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Mild cognitive impairment | Participants24 | Lead sponsorIndustry | StatusActive, not recruiting | Library tests named
|
| NCT07105800 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment, Aging, frailty and exercise | Participants50 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07089303 | Start2025 | PhaseObservational | ConditionsDementia and Alzheimer's, Mild cognitive impairment | Participants750 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07054645 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment, Aging, frailty and exercise | Participants34 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT06948149 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Aging, frailty and exercise | Participants140 | Lead sponsorOther | StatusRecruiting | Library tests named
|
Questions, answered from the data
How many mild cognitive impairment trials use the Stroop Color-Word Test?
126 registered mild cognitive impairment studies on ClinicalTrials.gov name it in an outcome measure, 50 of them in a primary outcome: 15% of the condition's 859 studies with a cognitive outcome, against 12% of all of them. It is the 5th most named test in mild cognitive impairment trials.
Which tests do mild cognitive impairment trials use with the Stroop Color-Word Test?
The Trail Making Test (64 studies), Verbal Fluency (48 studies) and the Digit Span Test (39 studies).
When do mild cognitive impairment trials measure the Stroop Color-Word Test?
Half of the primary outcomes that name the Stroop Color-Word Test are measured within 13 weeks of the start, and the middle half from 8 weeks to 8 months. 46 primary outcomes give a duration.
How many completed mild cognitive impairment trials that use the Stroop Color-Word Test have reported results?
19 of the 48 completed studies that name it, 40%, have reported results: 8 posted them on ClinicalTrials.gov, 16 have a results paper linked to the registry record, and 5 did both. The other 29 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.
Run the Stroop Color-Word Test in your trial
Choose tests with a record in registered trials, and run them in a browser at every site, on the same version each visit.