Clinical trials data
Stroop Color-Word Test in obesity and diabetes trials: 103 registered studies
Every registered obesity and diabetes 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 obesity and diabetes studies name it in an outcome measure
- 103
- Name it in a primary outcome, 33%
- 34 of 103
Tests named in the same studies
- 1
Trail Making Test42 studies, 15 as a primary outcome
- 2
Verbal Learning28 studies, 11 as a primary outcome
- 3
Verbal Fluency20 studies, 12 as a primary outcome
- 4
Digit Span Test17 studies, 6 as a primary outcome
- 5
Symbol Coding15 studies, 6 as a primary outcome
- 6
Category Fluency9 studies, 3 as a primary outcome
- 7
N-Back Task9 studies, 2 as a primary outcome
- 8
Complex Figure Copy and Recall8 studies, 3 as a primary outcome
- 9
Picture Naming Test7 studies, 3 as a primary outcome
- 10
Card Sorting Test (Berg)6 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 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 3 | 1 |
| 2012 | 3 | 0 |
| 2013 | 1 | 1 |
| 2014 | 4 | 0 |
| 2015 | 8 | 1 |
| 2016 | 5 | 1 |
| 2017 | 4 | 0 |
| 2018 | 1 | 1 |
| 2019 | 8 | 2 |
| 2020 | 5 | 2 |
| 2021 | 6 | 5 |
| 2022 | 16 | 7 |
| 2023 | 6 | 3 |
| 2024 | 12 | 4 |
| 2025 | 9 | 4 |
| 2026 | 9 | 1 |
Phases and study sizes
By phase
- Early phase 11 studies, 0 as a primary outcome
- Phase 11 studies, 1 as a primary outcome
- Phase 24 studies, 2 as a primary outcome
- Phase 31 studies, 0 as a primary outcome
- Phase 43 studies, 0 as a primary outcome
- Not applicable74 studies, 25 as a primary outcome
- Observational19 studies, 6 as a primary outcome
Participants per study
- Not applicable54 median, 35 to 115
- Observational100 median, 62 to 140
Show as a table
| Phase | Studies with a size | Median | Middle half |
|---|---|---|---|
| Not applicable | 73 | 54 | 35 to 115 |
| Observational | 19 | 100 | 62 to 140 |
When obesity and diabetes trials measure it
Latest time point of each outcome
- Within a day17 outcomes, 5 as a primary outcome
- Up to 4 weeks17 outcomes, 3 as a primary outcome
- 1 to 3 months14 outcomes, 10 as a primary outcome
- 3 to 6 months26 outcomes, 8 as a primary outcome
- 6 to 12 months12 outcomes, 5 as a primary outcome
- 1 to 2 years3 outcomes, 0 as a primary outcome
- Over 2 years9 outcomes, 1 as a primary outcome
- No duration given5 outcomes, 2 as a primary outcome
A test as a primary outcomeOnly in secondary or other outcomes
98 of the 103 outcome measures give a duration. A single visit counts as within a day.
Status, results, interventions and countries
Status
- Recruiting14 studies, 6 as a primary outcome
- Not yet recruiting10 studies, 1 as a primary outcome
- Active, not recruiting4 studies, 0 as a primary outcome
- Completed54 studies, 19 as a primary outcome
- Stopped early5 studies, 3 as a primary outcome
- Status unknown16 studies, 5 as a primary outcome
What they test
- Behavioral34 studies, 12 as a primary outcome
- Drug13 studies, 6 as a primary outcome
- Device7 studies, 1 as a primary outcome
- Dietary supplement12 studies, 3 as a primary outcome
- Procedure5 studies, 1 as a primary outcome
- Diagnostic test2 studies, 0 as a primary outcome
- Biological1 studies, 0 as a primary outcome
- Other36 studies, 15 as a primary outcome
- None given6 studies, 2 as a primary outcome
Intervention types as registered. A study can list several; observational studies often list none.
Where their sites are
- United States29 studies, 10 as a primary outcome
- Spain11 studies, 5 as a primary outcome
- Canada9 studies, 1 as a primary outcome
- Türkiye6 studies, 3 as a primary outcome
- China4 studies, 2 as a primary outcome
- Australia3 studies, 0 as a primary outcome
- Germany3 studies, 1 as a primary outcome
- Italy3 studies, 0 as a primary outcome
- Thailand3 studies, 3 as a primary outcome
- Brazil2 studies, 0 as a primary outcome
- Denmark2 studies, 0 as a primary outcome
- France2 studies, 1 as a primary outcome
23 countries in all. A study with sites in several counts in each; 11 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 obesity and diabetes studies that name the Stroop Color-Word Test: 24 of 54, 44%
Every completed study with a cognitive outcome: 3,626 of 7,953, 46%
| Results | Completed obesity and diabetes studies that name the Stroop Color-Word Test | Every completed study |
|---|---|---|
| Results on ClinicalTrials.gov and a paper | 6, 11% | 776, 10% |
| Results on ClinicalTrials.gov only | 2, 4% | 1,139, 14% |
| A results paper only | 16, 30% | 1,711, 22% |
| Neither | 30, 56% | 4,327, 54% |
The 103 studies
103 studies match. 34 name the Stroop Color-Word Test in a primary outcome. Median size 61 participants. Median time to the primary outcome: 13 weeks.
Loading 103 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 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 3 | 1 |
| 2012 | 3 | 0 |
| 2013 | 1 | 1 |
| 2014 | 4 | 0 |
| 2015 | 8 | 1 |
| 2016 | 5 | 1 |
| 2017 | 4 | 0 |
| 2018 | 1 | 1 |
| 2019 | 8 | 2 |
| 2020 | 5 | 2 |
| 2021 | 6 | 5 |
| 2022 | 16 | 7 |
| 2023 | 6 | 3 |
| 2024 | 12 | 4 |
| 2025 | 9 | 4 |
| 2026 | 9 | 1 |
Library tests named most
Largest condition groups
Phases
Participants
Lead sponsor: industry 5, other 98. Interventional 84, observational 19.
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 |
|---|---|---|---|---|---|---|---|
| NCT07820774 | Start2026 | PhaseNot applicable | ConditionsObesity and diabetes | Participants54 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07705724 | Start2026 | PhaseNot applicable | ConditionsObesity and diabetes | Participants40 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07704229 | Start2026 | PhaseObservational | ConditionsObesity and diabetes | Participants150 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07688564 | Start2026 | PhaseNot applicable | ConditionsObesity and diabetes, Pain and fatigue | Participants156 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07642518 | Start2026 | PhaseNot applicable | ConditionsMild cognitive impairment, Obesity and diabetes | Participants38 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07611201 | Start2025 | PhaseObservational | ConditionsObesity and diabetes | Participants90 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07600567 | Start2026 | PhaseNot applicable | ConditionsObesity and diabetes | Participants300 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07501377 | Start2026 | PhaseNot applicable | ConditionsObesity and diabetes | Participants120 | 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
|
| NCT07390292 | Start2026 | PhaseObservational | ConditionsObesity and diabetes | Participants80 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT07164768 | Start2024 | PhaseObservational | ConditionsObesity and diabetes | Participants400 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT07118904 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes, Sleep and sleep disorders | Participants12 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07107620 | Start2022 | PhaseObservational | ConditionsObesity and diabetes | Participants141 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT07040748 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes | Participants84 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06969235 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes | Participants10 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06960941 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes | Participants24 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT06936657 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes | Participants150 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT06869941 | Start2025 | PhaseObservational | ConditionsObesity and diabetes | Participants100 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06830252 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes | Participants50 | Lead sponsorOther | StatusNot yet recruiting | Library tests named
|
| NCT06819371 | Start2025 | PhaseNot applicable | ConditionsObesity and diabetes | Participants36 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT06734546 | Start2024 | PhaseNot applicable | ConditionsDementia and Alzheimer's, Obesity and diabetes | Participants75 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06721429 | Start2024 | PhaseNot applicable | ConditionsObesity and diabetes | Participants45 | Lead sponsorOther | StatusCompleted | Library tests named
|
| NCT06668077 | Start2024 | PhaseNot applicable | ConditionsObesity and diabetes | Participants141 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06600100 | Start2024 | PhaseNot applicable | ConditionsObesity and diabetes | Participants54 | Lead sponsorOther | StatusRecruiting | Library tests named
|
| NCT06578325 | Start2021 | PhaseNot applicable | ConditionsObesity and diabetes | Participants40 | Lead sponsorOther | StatusCompleted | Library tests named
|
Questions, answered from the data
How many obesity and diabetes trials use the Stroop Color-Word Test?
103 registered obesity and diabetes studies on ClinicalTrials.gov name it in an outcome measure, 34 of them in a primary outcome: 16% of the condition's 627 studies with a cognitive outcome, against 12% of all of them. It is the test obesity and diabetes trials name most.
Which tests do obesity and diabetes trials use with the Stroop Color-Word Test?
The Trail Making Test (42 studies), Verbal Learning (28 studies) and Verbal Fluency (20 studies).
When do obesity and diabetes 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 5 weeks to 6 months. 32 primary outcomes give a duration.
How many completed obesity and diabetes trials that use the Stroop Color-Word Test have reported results?
24 of the 54 completed studies that name it, 44%, have reported results: 8 posted them on ClinicalTrials.gov, 22 have a results paper linked to the registry record, and 6 did both. The other 30 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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