Clinical trials data
Stroop Color-Word Test in aging, frailty and exercise trials: 230 registered studies
Every registered aging, frailty and exercise 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 aging, frailty and exercise studies name it in an outcome measure
- 230
- Name it in a primary outcome, 43%
- 100 of 230
Tests named in the same studies
- 1
Trail Making Test90 studies, 38 as a primary outcome
- 2
Digit Span Test53 studies, 21 as a primary outcome
- 3
Verbal Learning38 studies, 12 as a primary outcome
- 4
Verbal Fluency37 studies, 16 as a primary outcome
- 5
Symbol Coding30 studies, 7 as a primary outcome
- 6
N-Back Task17 studies, 13 as a primary outcome
- 7
Go/No-Go Task11 studies, 7 as a primary outcome
- 8
Category Fluency10 studies, 7 as a primary outcome
- 9
Corsi Block-Tapping Test9 studies, 4 as a primary outcome
- 10
Card Sorting Test (Berg)9 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 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 4 | 3 |
| 2013 | 3 | 1 |
| 2014 | 6 | 2 |
| 2015 | 10 | 3 |
| 2016 | 4 | 1 |
| 2017 | 9 | 2 |
| 2018 | 19 | 13 |
| 2019 | 11 | 4 |
| 2020 | 7 | 3 |
| 2021 | 24 | 13 |
| 2022 | 33 | 14 |
| 2023 | 25 | 10 |
| 2024 | 23 | 9 |
| 2025 | 31 | 14 |
| 2026 | 18 | 6 |
Phases and study sizes
By phase
- Early phase 13 studies, 2 as a primary outcome
- Phase 12 studies, 0 as a primary outcome
- Phase 1/23 studies, 1 as a primary outcome
- Phase 21 studies, 0 as a primary outcome
- Phase 2/31 studies, 0 as a primary outcome
- Phase 32 studies, 0 as a primary outcome
- Phase 42 studies, 0 as a primary outcome
- Not applicable192 studies, 83 as a primary outcome
- Observational24 studies, 14 as a primary outcome
Participants per study
- Not applicable60 median, 32 to 110
- Observational68 median, 50 to 307
Show as a table
| Phase | Studies with a size | Median | Middle half |
|---|---|---|---|
| Not applicable | 190 | 60 | 32 to 110 |
| Observational | 24 | 68 | 50 to 307 |
When aging, frailty and exercise trials measure it
Latest time point of each outcome
- Within a day43 outcomes, 21 as a primary outcome
- Up to 4 weeks31 outcomes, 20 as a primary outcome
- 1 to 3 months71 outcomes, 27 as a primary outcome
- 3 to 6 months38 outcomes, 9 as a primary outcome
- 6 to 12 months20 outcomes, 9 as a primary outcome
- 1 to 2 years6 outcomes, 2 as a primary outcome
- Over 2 years4 outcomes, 1 as a primary outcome
- No duration given17 outcomes, 11 as a primary outcome
A test as a primary outcomeOnly in secondary or other outcomes
213 of the 230 outcome measures give a duration. A single visit counts as within a day.
Status, results, interventions and countries
Status
- Recruiting34 studies, 12 as a primary outcome
- Not yet recruiting15 studies, 5 as a primary outcome
- Active, not recruiting11 studies, 5 as a primary outcome
- Completed121 studies, 57 as a primary outcome
- Stopped early7 studies, 2 as a primary outcome
- Status unknown42 studies, 19 as a primary outcome
What they test
- Behavioral102 studies, 47 as a primary outcome
- Drug10 studies, 3 as a primary outcome
- Device22 studies, 8 as a primary outcome
- Dietary supplement27 studies, 5 as a primary outcome
- Procedure1 studies, 0 as a primary outcome
- Diagnostic test2 studies, 0 as a primary outcome
- Biological2 studies, 0 as a primary outcome
- Combination product1 studies, 0 as a primary outcome
- Other77 studies, 38 as a primary outcome
- None given9 studies, 5 as a primary outcome
Intervention types as registered. A study can list several; observational studies often list none.
Where their sites are
- United States50 studies, 20 as a primary outcome
- Taiwan22 studies, 15 as a primary outcome
- Türkiye18 studies, 11 as a primary outcome
- Spain15 studies, 7 as a primary outcome
- Canada13 studies, 3 as a primary outcome
- France10 studies, 2 as a primary outcome
- Italy9 studies, 2 as a primary outcome
- United Kingdom8 studies, 2 as a primary outcome
- Hong Kong7 studies, 2 as a primary outcome
- Sweden7 studies, 6 as a primary outcome
- Netherlands6 studies, 1 as a primary outcome
- Portugal6 studies, 2 as a primary outcome
32 countries in all. A study with sites in several counts in each; 17 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 aging, frailty and exercise studies that name the Stroop Color-Word Test: 43 of 121, 36%
Every completed study with a cognitive outcome: 3,626 of 7,953, 46%
| Results | Completed aging, frailty and exercise studies that name the Stroop Color-Word Test | Every completed study |
|---|---|---|
| Results on ClinicalTrials.gov and a paper | 3, 2% | 776, 10% |
| Results on ClinicalTrials.gov only | 8, 7% | 1,139, 14% |
| A results paper only | 32, 26% | 1,711, 22% |
| Neither | 78, 64% | 4,327, 54% |
The 230 studies
230 studies match. 100 name the Stroop Color-Word Test in a primary outcome. Median size 60 participants. Median time to the primary outcome: 8 weeks.
Loading 230 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 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 4 | 3 |
| 2013 | 3 | 1 |
| 2014 | 6 | 2 |
| 2015 | 10 | 3 |
| 2016 | 4 | 1 |
| 2017 | 9 | 2 |
| 2018 | 19 | 13 |
| 2019 | 11 | 4 |
| 2020 | 7 | 3 |
| 2021 | 24 | 13 |
| 2022 | 33 | 14 |
| 2023 | 25 | 10 |
| 2024 | 23 | 9 |
| 2025 | 31 | 14 |
| 2026 | 18 | 6 |
Library tests named most
Largest condition groups
Phases
Participants
Lead sponsor: industry 5, other 225. Interventional 206, observational 24.
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 |
|---|---|---|---|---|---|---|---|
| NCT07902206 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise, Huntington's disease | Participants88 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07853274 | Start2024 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants23 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07809750 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants700 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07808710 | Start2024 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants11 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07771556 | Start2020 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants30 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07735078 | Start2025 | PhaseObservational | ConditionsAging, frailty and exercise | Participants55 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07701317 | Start2025 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants108 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07666685 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise, Cardiovascular disease | Participants120 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07628686 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants120 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07625371 | Start2024 | PhaseNot applicable | ConditionsHealthy volunteers, Aging, frailty and exercise | Participants40 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07624630 | Start2026 | PhaseObservational | ConditionsStroke, Aging, frailty and exercise | Participants50 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07619976 | Start2023 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants20 | Lead sponsorOther | StatusCompleted | 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
|
| NCT07608913 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants27 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07604519 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise, Pain and fatigue | Participants97 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07553507 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise, Sleep and sleep disorders | Participants80 | Lead sponsorOther | StatusRecruiting | 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
|
| NCT07507279 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants66 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07497711 | Start2026 | PhasePhase 2/3 | ConditionsAging, frailty and exercise, Pain and fatigue | Participants145 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07497334 | Start2025 | PhaseNot applicable | ConditionsMild cognitive impairment, Aging, frailty and exercise | Participants45 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07485062 | Start2026 | PhasePhase 4 | ConditionsAging, frailty and exercise, Obesity and diabetes | Participants164 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07443657 | Start2024 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants30 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07427329 | Start2025 | PhaseNot applicable | ConditionsAging, frailty and exercise, Pain and fatigue | Participants434 | Lead sponsorOther | StatusActive, not recruiting | Library tests named
|
| NCT07379879 | Start2025 | PhaseNot applicable | ConditionsAging, frailty and exercise | Participants12 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07333404 | Start2026 | PhaseNot applicable | ConditionsAging, frailty and exercise, Pain and fatigue | Participants16 | Lead sponsorOther | StatusCompleted | Library tests named
|
Questions, answered from the data
How many aging, frailty and exercise trials use the Stroop Color-Word Test?
230 registered aging, frailty and exercise studies on ClinicalTrials.gov name it in an outcome measure, 100 of them in a primary outcome: 16% of the condition's 1,398 studies with a cognitive outcome, against 12% of all of them. It is the 2nd most named test in aging, frailty and exercise trials.
Which tests do aging, frailty and exercise trials use with the Stroop Color-Word Test?
The Trail Making Test (90 studies), the Digit Span Test (53 studies) and Verbal Learning (38 studies).
When do aging, frailty and exercise trials measure the Stroop Color-Word Test?
Half of the primary outcomes that name the Stroop Color-Word Test are measured within 8 weeks of the start, and the middle half from 5 days to 13 weeks. 89 primary outcomes give a duration.
How many completed aging, frailty and exercise trials that use the Stroop Color-Word Test have reported results?
43 of the 121 completed studies that name it, 36%, have reported results: 11 posted them on ClinicalTrials.gov, 35 have a results paper linked to the registry record, and 3 did both. The other 78 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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