Clinical trials data

Symbol Coding in obesity and diabetes trials: 59 registered studies

Every registered obesity and diabetes study on ClinicalTrials.gov that names Symbol Coding 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: 59
Name it in a primary outcome, 46%: 27 of 59
Of the condition's 627 studies name it, against 9% of all registered studies: 9%; Other conditions
Median participants per study: 66; By phase

Try the Symbol Key Game Try Symbol Coding

Tests named in the same studies

The library tests that obesity and diabetes studies naming Symbol Coding name most often beside it.

1
Trail Making Test26 studies, 13 as a primary outcome
2
Verbal Learning22 studies, 14 as a primary outcome
3
Digit Span Test17 studies, 11 as a primary outcome
4
Stroop Color-Word Test15 studies, 6 as a primary outcome
5
Verbal Fluency12 studies, 9 as a primary outcome
6
Category Fluency8 studies, 7 as a primary outcome
7
Short Story Recall5 studies, 2 as a primary outcome
8
Task Switching Test5 studies, 2 as a primary outcome
9
Letter-Number Sequencing Task4 studies, 3 as a primary outcome
10
Picture Naming Test4 studies, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Studies by start year

Each study counted once. 2026 is partly planned starts.

A test as a primary outcomeOnly in secondary or other outcomes

Show as a table

Registered studies by start year
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	1	1
2006	0	0
2007	0	0
2008	1	1
2009	2	0
2010	3	2
2011	1	0
2012	1	0
2013	2	2
2014	0	0
2015	1	0
2016	2	1
2017	1	1
2018	3	1
2019	5	1
2020	0	0
2021	4	2
2022	5	2
2023	6	3
2024	9	2
2025	5	4
2026	6	4

Phases and study sizes

By phase

Early phase 11 studies, 0 as a primary outcome
Phase 14 studies, 2 as a primary outcome
Phase 22 studies, 1 as a primary outcome
Phase 2/31 studies, 1 as a primary outcome
Phase 31 studies, 0 as a primary outcome
Phase 46 studies, 3 as a primary outcome
Not applicable37 studies, 15 as a primary outcome
Observational7 studies, 5 as a primary outcome

Participants per study

Not applicable40 median, 20 to 99

Participants per study. The bar spans the middle half of the studies in each phase, the mark is the median, and the axis is logarithmic. Phases with fewer than 10 studies that give a size are left out.

Show as a table

Participants per obesity and diabetes study that names Symbol Coding, by phase
Phase	Studies with a size	Median	Middle half
Not applicable	37	40	20 to 99

When obesity and diabetes trials measure it

Half of the primary outcomes that name Symbol Coding are measured within 12 weeks of the start, and the middle half from the first day to 6 months. 25 primary outcomes give a duration.

Latest time point of each outcome

Within a day14 outcomes, 8 as a primary outcome
Up to 4 weeks7 outcomes, 2 as a primary outcome
1 to 3 months8 outcomes, 5 as a primary outcome
3 to 6 months12 outcomes, 4 as a primary outcome
6 to 12 months7 outcomes, 3 as a primary outcome
1 to 2 years4 outcomes, 2 as a primary outcome
Over 2 years4 outcomes, 1 as a primary outcome
No duration given3 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

56 of the 59 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting8 studies, 6 as a primary outcome
Not yet recruiting3 studies, 0 as a primary outcome
Active, not recruiting5 studies, 3 as a primary outcome
Completed35 studies, 16 as a primary outcome
Stopped early3 studies, 2 as a primary outcome
Status unknown5 studies, 0 as a primary outcome

What they test

Behavioral13 studies, 7 as a primary outcome
Drug15 studies, 7 as a primary outcome
Device5 studies, 1 as a primary outcome
Dietary supplement13 studies, 4 as a primary outcome
Procedure2 studies, 0 as a primary outcome
Biological1 studies, 0 as a primary outcome
Radiation1 studies, 0 as a primary outcome
Other21 studies, 11 as a primary outcome
None given4 studies, 3 as a primary outcome

Intervention types as registered. A study can list several; observational studies often list none.

36 countries in all. A study with sites in several counts in each; 0 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 Symbol Coding: 17 of 35, 49%

Every completed study with a cognitive outcome: 3,626 of 7,953, 46%

Completed obesity and diabetes studies that name Symbol Coding and every completed study, by how they reported results
Results	Completed obesity and diabetes studies that name Symbol Coding	Every completed study
Results on ClinicalTrials.gov and a paper	4, 11%	776, 10%
Results on ClinicalTrials.gov only	7, 20%	1,139, 14%
A results paper only	6, 17%	1,711, 22%
Neither	18, 51%	4,327, 54%

The 59 studies

Filter by phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.

59 studies match. 27 name Symbol Coding in a primary outcome. Median size 66 participants. Median time to the primary outcome: 12 weeks.

Loading 59 studies; the filters turn on when they arrive.

By start year

2026 is partly planned starts. Not shown: 1 that started before 2000.

Show as a table

Matching studies by start year
Start year	Studies	As a primary outcome
2000	0	0
2001	0	0
2002	0	0
2003	0	0
2004	0	0
2005	1	1
2006	0	0
2007	0	0
2008	1	1
2009	2	0
2010	3	2
2011	1	0
2012	1	0
2013	2	2
2014	0	0
2015	1	0
2016	2	1
2017	1	1
2018	3	1
2019	5	1
2020	0	0
2021	4	2
2022	5	2
2023	6	3
2024	9	2
2025	5	4
2026	6	4

Library tests named most

Conditions

Obesity and diabetes59 studies, 27 as a primary outcome
Aging, frailty and exercise8 studies, 2 as a primary outcome
Cardiovascular disease5 studies, 2 as a primary outcome
Dementia and Alzheimer's4 studies, 2 as a primary outcome
Sleep and sleep disorders4 studies, 2 as a primary outcome
Mild cognitive impairment2 studies, 2 as a primary outcome
Schizophrenia and psychosis2 studies, 0 as a primary outcome
Depression and bipolar disorder2 studies, 0 as a primary outcome
Cancer1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 4, NIH 2, other 53. Interventional 52, observational 7.

As a primary outcomeSecondary or other outcomeSymbol Coding

The studies, newest registration first

Each number opens the study's record on ClinicalTrials.gov.

Registered studies that match the filters, newest registration first, with the library tests each one names and the outcome list that names them.
Study	Start	Phase	Conditions	Participants	Lead sponsor	Status	Library tests named, with the latest time point
NCT07870291	Start2026	PhaseNot applicable	ConditionsObesity and diabetes	Participants105	Lead sponsorOther	StatusActive, not recruiting	Library tests named Trail Making TestPrimary12 weeks Symbol CodingPrimary12 weeks
NCT07750223	Start2026	PhaseNot applicable	ConditionsObesity and diabetes	Participants105	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary10 weeks Symbol CodingPrimary10 weeks
NCT07704229	Start2026	PhaseObservational	ConditionsObesity and diabetes	Participants150	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary3 years Stroop Color-Word TestSecondary3 years Verbal LearningSecondary3 years Digit Span TestSecondary3 years Symbol CodingSecondary3 years
NCT07694596	Start2026	PhaseNot applicable	ConditionsObesity and diabetes	Participants200	Lead sponsorOther	StatusActive, not recruiting	Library tests named Trail Making TestPrimary12 months Verbal FluencyPrimary12 months Digit Span TestPrimary12 months Symbol CodingPrimary12 months Category FluencyPrimary12 months
NCT07485062	Start2026	PhasePhase 4	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants164	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary7 months Stroop Color-Word TestSecondary7 months Verbal LearningSecondary7 months Digit Span TestSecondary7 months Symbol CodingSecondary7 months Eriksen Flanker TaskSecondary7 months
NCT07420699	Start2023	PhaseNot applicable	ConditionsObesity and diabetes	Participants40	Lead sponsorOther	StatusCompleted	Library tests named Verbal LearningPrimarysame day Digit Span TestPrimarysame day Symbol CodingPrimarysame day Corsi Block-Tapping TestPrimarysame day
NCT07374705	Start2026	PhaseObservational	ConditionsObesity and diabetes	Participants150	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary Verbal LearningPrimary Verbal FluencyPrimary Digit Span TestPrimary Symbol CodingPrimary Letter-Number Sequencing TaskPrimary
NCT07284316	Start2025	PhasePhase 2/3	ConditionsObesity and diabetes	Participants100	Lead sponsorOther	StatusActive, not recruiting	Library tests named Verbal LearningPrimary12 months Verbal FluencyPrimary12 months Symbol CodingPrimary12 months Category FluencyPrimary12 months
NCT07118904	Start2025	PhaseNot applicable	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants12	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimary1 week Symbol CodingPrimary1 week
NCT07040748	Start2025	PhaseNot applicable	ConditionsObesity and diabetes	Participants84	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary6 months Stroop Color-Word TestPrimary6 months Verbal LearningPrimary6 months Verbal FluencyPrimary6 months Digit Span TestPrimary6 months Symbol CodingPrimary6 months Continuous Performance TestPrimary6 months Category FluencyPrimary6 months Card Sorting Test (Berg)Primary6 months Short Story RecallPrimary6 months
NCT06960941	Start2025	PhaseNot applicable	ConditionsObesity and diabetes	Participants24	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Symbol CodingSecondary6 months
NCT06912321	Start2024	PhaseObservational	ConditionsObesity and diabetes	Participants400	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 years Verbal LearningPrimarysame day Digit Span TestPrimarysame day Symbol CodingPrimarysame day Category FluencyPrimarysame day Complex Figure Copy and RecallPrimarysame day
NCT06857994	Start2025	PhaseObservational	ConditionsObesity and diabetes, Cardiovascular disease	Participants101	Lead sponsorOther	StatusCompleted	Library tests named Trail Making TestPrimary Verbal LearningPrimary Verbal FluencyPrimary Digit Span TestPrimary Symbol CodingPrimary N-Back TaskSecondary Letter-Number Sequencing TaskPrimary
NCT06624462	Start2023	PhaseNot applicable	ConditionsSchizophrenia and psychosis, Depression and bipolar disorder, Obesity and diabetes	Participants84	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestOther outcome12 months Symbol CodingOther outcome12 months Category FluencyOther outcome12 months
NCT06524388	Start2024	PhaseNot applicable	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants120	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Verbal LearningSecondary6 months Symbol CodingSecondary6 months Picture Naming TestSecondary6 months
NCT06496412	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary6 months Stroop Color-Word TestPrimary6 months Verbal LearningPrimary6 months Verbal FluencyPrimary6 months Symbol CodingPrimary6 months Picture Naming TestPrimary6 months Task Switching TestPrimary6 months Clock Drawing TaskPrimary6 months
NCT06260254	Start2024	PhaseNot applicable	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants23	Lead sponsorOther	StatusCompleted	Library tests named Symbol CodingSecondary N-Back TaskSecondary Psychomotor Vigilance TaskSecondary Matrix ReasoningSecondary Balloon RiskSecondary
NCT06251635	Start2024	PhaseNot applicable	ConditionsSchizophrenia and psychosis, Obesity and diabetes	Participants15	Lead sponsorOther	StatusActive, not recruiting	Library tests named Symbol CodingSecondary6 months
NCT06243172	Start2024	PhaseObservational	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants60	Lead sponsorOther	StatusStatus unknown	Library tests named Trail Making TestSecondarysame day Verbal LearningSecondarysame day Verbal FluencySecondarysame day Symbol CodingSecondarysame day Letter-Number Sequencing TaskSecondarysame day
NCT06242535	Start2023	PhaseEarly phase 1	ConditionsDepression and bipolar disorder, Aging, frailty and exercise, Obesity and diabetes, Cardiovascular disease	Participants13	Lead sponsorIndustry	StatusCompleted	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Symbol CodingSecondary6 months Eriksen Flanker TaskSecondary6 months
NCT06236256	Start2024	PhaseNot applicable	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants42	Lead sponsorOther	StatusCompleted	Library tests named Symbol CodingOther outcome12 months
NCT06223204	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants16	Lead sponsorOther	StatusCompleted	Library tests named Symbol CodingSecondarysame day
NCT06122441	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants119	Lead sponsorOther	StatusActive, not recruiting	Library tests named Symbol CodingOther outcome2 years
NCT05997316	Start2023	PhaseNot applicable	ConditionsMild cognitive impairment, Obesity and diabetes	Participants33	Lead sponsorOther	StatusCompleted Results	Library tests named Trail Making TestPrimary12 weeks Verbal LearningPrimary12 weeks Verbal FluencyPrimary12 weeks Digit Span TestPrimary12 weeks Symbol CodingPrimary12 weeks Category FluencyPrimary12 weeks
NCT05794009	Start2022	PhaseNot applicable	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants124	Lead sponsorOther	StatusCompleted	Library tests named Digit Span TestSecondarysame day Symbol CodingSecondarysame day

Questions, answered from the data

How many obesity and diabetes trials use Symbol Coding?

59 registered obesity and diabetes studies on ClinicalTrials.gov name it in an outcome measure, 27 of them in a primary outcome: 9% of the condition's 627 studies with a cognitive outcome, against 9% of all of them. It is the 6th most named test in obesity and diabetes trials.

Which tests do obesity and diabetes trials use with Symbol Coding?

The Trail Making Test (26 studies), Verbal Learning (22 studies) and the Digit Span Test (17 studies).

When do obesity and diabetes trials measure Symbol Coding?

Half of the primary outcomes that name Symbol Coding are measured within 12 weeks of the start, and the middle half from the first day to 6 months. 25 primary outcomes give a duration.

How many completed obesity and diabetes trials that use Symbol Coding have reported results?

17 of the 35 completed studies that name it, 49%, have reported results: 11 posted them on ClinicalTrials.gov, 10 have a results paper linked to the registry record, and 4 did both. The other 18 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.

The census counts Symbol Key Game and Symbol Coding as one test family, so this page counts their studies together.

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Choose tests with a record in registered trials, and run them in a browser at every site, on the same version each visit.

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Clinical trials data

Symbol Coding in obesity and diabetes trials: 59 registered studies

Registered obesity and diabetes studies name it in an outcome measure: 59
Name it in a primary outcome, 46%: 27 of 59
Of the condition's 627 studies name it, against 9% of all registered studies: 9%; Other conditions
Median participants per study: 66; By phase

Try the Symbol Key Game Try Symbol Coding

Tests named in the same studies

The library tests that obesity and diabetes studies naming Symbol Coding name most often beside it.

1
Trail Making Test26 studies, 13 as a primary outcome
2
Verbal Learning22 studies, 14 as a primary outcome
3
Digit Span Test17 studies, 11 as a primary outcome
4
Stroop Color-Word Test15 studies, 6 as a primary outcome
5
Verbal Fluency12 studies, 9 as a primary outcome
6
Category Fluency8 studies, 7 as a primary outcome
7
Short Story Recall5 studies, 2 as a primary outcome
8
Task Switching Test5 studies, 2 as a primary outcome
9
Letter-Number Sequencing Task4 studies, 3 as a primary outcome
10
Picture Naming Test4 studies, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Studies by start year

Each study counted once. 2026 is partly planned starts.

A test as a primary outcomeOnly in secondary or other outcomes

Show as a table

Registered studies by start year
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	1	1
2006	0	0
2007	0	0
2008	1	1
2009	2	0
2010	3	2
2011	1	0
2012	1	0
2013	2	2
2014	0	0
2015	1	0
2016	2	1
2017	1	1
2018	3	1
2019	5	1
2020	0	0
2021	4	2
2022	5	2
2023	6	3
2024	9	2
2025	5	4
2026	6	4

Phases and study sizes

By phase

Early phase 11 studies, 0 as a primary outcome
Phase 14 studies, 2 as a primary outcome
Phase 22 studies, 1 as a primary outcome
Phase 2/31 studies, 1 as a primary outcome
Phase 31 studies, 0 as a primary outcome
Phase 46 studies, 3 as a primary outcome
Not applicable37 studies, 15 as a primary outcome
Observational7 studies, 5 as a primary outcome

Participants per study

Not applicable40 median, 20 to 99

Show as a table

Participants per obesity and diabetes study that names Symbol Coding, by phase
Phase	Studies with a size	Median	Middle half
Not applicable	37	40	20 to 99

When obesity and diabetes trials measure it

Half of the primary outcomes that name Symbol Coding are measured within 12 weeks of the start, and the middle half from the first day to 6 months. 25 primary outcomes give a duration.

Latest time point of each outcome

Within a day14 outcomes, 8 as a primary outcome
Up to 4 weeks7 outcomes, 2 as a primary outcome
1 to 3 months8 outcomes, 5 as a primary outcome
3 to 6 months12 outcomes, 4 as a primary outcome
6 to 12 months7 outcomes, 3 as a primary outcome
1 to 2 years4 outcomes, 2 as a primary outcome
Over 2 years4 outcomes, 1 as a primary outcome
No duration given3 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

56 of the 59 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting8 studies, 6 as a primary outcome
Not yet recruiting3 studies, 0 as a primary outcome
Active, not recruiting5 studies, 3 as a primary outcome
Completed35 studies, 16 as a primary outcome
Stopped early3 studies, 2 as a primary outcome
Status unknown5 studies, 0 as a primary outcome

What they test

Behavioral13 studies, 7 as a primary outcome
Drug15 studies, 7 as a primary outcome
Device5 studies, 1 as a primary outcome
Dietary supplement13 studies, 4 as a primary outcome
Procedure2 studies, 0 as a primary outcome
Biological1 studies, 0 as a primary outcome
Radiation1 studies, 0 as a primary outcome
Other21 studies, 11 as a primary outcome
None given4 studies, 3 as a primary outcome

Intervention types as registered. A study can list several; observational studies often list none.

36 countries in all. A study with sites in several counts in each; 0 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 Symbol Coding: 17 of 35, 49%

Every completed study with a cognitive outcome: 3,626 of 7,953, 46%

Completed obesity and diabetes studies that name Symbol Coding and every completed study, by how they reported results
Results	Completed obesity and diabetes studies that name Symbol Coding	Every completed study
Results on ClinicalTrials.gov and a paper	4, 11%	776, 10%
Results on ClinicalTrials.gov only	7, 20%	1,139, 14%
A results paper only	6, 17%	1,711, 22%
Neither	18, 51%	4,327, 54%

The 59 studies

Filter by phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.

59 studies match. 27 name Symbol Coding in a primary outcome. Median size 66 participants. Median time to the primary outcome: 12 weeks.

Loading 59 studies; the filters turn on when they arrive.

By start year

2026 is partly planned starts. Not shown: 1 that started before 2000.

Show as a table

Matching studies by start year
Start year	Studies	As a primary outcome
2000	0	0
2001	0	0
2002	0	0
2003	0	0
2004	0	0
2005	1	1
2006	0	0
2007	0	0
2008	1	1
2009	2	0
2010	3	2
2011	1	0
2012	1	0
2013	2	2
2014	0	0
2015	1	0
2016	2	1
2017	1	1
2018	3	1
2019	5	1
2020	0	0
2021	4	2
2022	5	2
2023	6	3
2024	9	2
2025	5	4
2026	6	4

Library tests named most

Conditions

Obesity and diabetes59 studies, 27 as a primary outcome
Aging, frailty and exercise8 studies, 2 as a primary outcome
Cardiovascular disease5 studies, 2 as a primary outcome
Dementia and Alzheimer's4 studies, 2 as a primary outcome
Sleep and sleep disorders4 studies, 2 as a primary outcome
Mild cognitive impairment2 studies, 2 as a primary outcome
Schizophrenia and psychosis2 studies, 0 as a primary outcome
Depression and bipolar disorder2 studies, 0 as a primary outcome
Cancer1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 4, NIH 2, other 53. Interventional 52, observational 7.

As a primary outcomeSecondary or other outcomeSymbol Coding

The studies, newest registration first

Each number opens the study's record on ClinicalTrials.gov.

Registered studies that match the filters, newest registration first, with the library tests each one names and the outcome list that names them.
Study	Start	Phase	Conditions	Participants	Lead sponsor	Status	Library tests named, with the latest time point
NCT07870291	Start2026	PhaseNot applicable	ConditionsObesity and diabetes	Participants105	Lead sponsorOther	StatusActive, not recruiting	Library tests named Trail Making TestPrimary12 weeks Symbol CodingPrimary12 weeks
NCT07750223	Start2026	PhaseNot applicable	ConditionsObesity and diabetes	Participants105	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary10 weeks Symbol CodingPrimary10 weeks
NCT07704229	Start2026	PhaseObservational	ConditionsObesity and diabetes	Participants150	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary3 years Stroop Color-Word TestSecondary3 years Verbal LearningSecondary3 years Digit Span TestSecondary3 years Symbol CodingSecondary3 years
NCT07694596	Start2026	PhaseNot applicable	ConditionsObesity and diabetes	Participants200	Lead sponsorOther	StatusActive, not recruiting	Library tests named Trail Making TestPrimary12 months Verbal FluencyPrimary12 months Digit Span TestPrimary12 months Symbol CodingPrimary12 months Category FluencyPrimary12 months
NCT07485062	Start2026	PhasePhase 4	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants164	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestPrimary7 months Stroop Color-Word TestSecondary7 months Verbal LearningSecondary7 months Digit Span TestSecondary7 months Symbol CodingSecondary7 months Eriksen Flanker TaskSecondary7 months
NCT07420699	Start2023	PhaseNot applicable	ConditionsObesity and diabetes	Participants40	Lead sponsorOther	StatusCompleted	Library tests named Verbal LearningPrimarysame day Digit Span TestPrimarysame day Symbol CodingPrimarysame day Corsi Block-Tapping TestPrimarysame day
NCT07374705	Start2026	PhaseObservational	ConditionsObesity and diabetes	Participants150	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary Verbal LearningPrimary Verbal FluencyPrimary Digit Span TestPrimary Symbol CodingPrimary Letter-Number Sequencing TaskPrimary
NCT07284316	Start2025	PhasePhase 2/3	ConditionsObesity and diabetes	Participants100	Lead sponsorOther	StatusActive, not recruiting	Library tests named Verbal LearningPrimary12 months Verbal FluencyPrimary12 months Symbol CodingPrimary12 months Category FluencyPrimary12 months
NCT07118904	Start2025	PhaseNot applicable	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants12	Lead sponsorOther	StatusCompleted	Library tests named Stroop Color-Word TestPrimary1 week Symbol CodingPrimary1 week
NCT07040748	Start2025	PhaseNot applicable	ConditionsObesity and diabetes	Participants84	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary6 months Stroop Color-Word TestPrimary6 months Verbal LearningPrimary6 months Verbal FluencyPrimary6 months Digit Span TestPrimary6 months Symbol CodingPrimary6 months Continuous Performance TestPrimary6 months Category FluencyPrimary6 months Card Sorting Test (Berg)Primary6 months Short Story RecallPrimary6 months
NCT06960941	Start2025	PhaseNot applicable	ConditionsObesity and diabetes	Participants24	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Symbol CodingSecondary6 months
NCT06912321	Start2024	PhaseObservational	ConditionsObesity and diabetes	Participants400	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 years Verbal LearningPrimarysame day Digit Span TestPrimarysame day Symbol CodingPrimarysame day Category FluencyPrimarysame day Complex Figure Copy and RecallPrimarysame day
NCT06857994	Start2025	PhaseObservational	ConditionsObesity and diabetes, Cardiovascular disease	Participants101	Lead sponsorOther	StatusCompleted	Library tests named Trail Making TestPrimary Verbal LearningPrimary Verbal FluencyPrimary Digit Span TestPrimary Symbol CodingPrimary N-Back TaskSecondary Letter-Number Sequencing TaskPrimary
NCT06624462	Start2023	PhaseNot applicable	ConditionsSchizophrenia and psychosis, Depression and bipolar disorder, Obesity and diabetes	Participants84	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestOther outcome12 months Symbol CodingOther outcome12 months Category FluencyOther outcome12 months
NCT06524388	Start2024	PhaseNot applicable	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants120	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestSecondary6 months Verbal LearningSecondary6 months Symbol CodingSecondary6 months Picture Naming TestSecondary6 months
NCT06496412	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Trail Making TestPrimary6 months Stroop Color-Word TestPrimary6 months Verbal LearningPrimary6 months Verbal FluencyPrimary6 months Symbol CodingPrimary6 months Picture Naming TestPrimary6 months Task Switching TestPrimary6 months Clock Drawing TaskPrimary6 months
NCT06260254	Start2024	PhaseNot applicable	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants23	Lead sponsorOther	StatusCompleted	Library tests named Symbol CodingSecondary N-Back TaskSecondary Psychomotor Vigilance TaskSecondary Matrix ReasoningSecondary Balloon RiskSecondary
NCT06251635	Start2024	PhaseNot applicable	ConditionsSchizophrenia and psychosis, Obesity and diabetes	Participants15	Lead sponsorOther	StatusActive, not recruiting	Library tests named Symbol CodingSecondary6 months
NCT06243172	Start2024	PhaseObservational	ConditionsObesity and diabetes, Sleep and sleep disorders	Participants60	Lead sponsorOther	StatusStatus unknown	Library tests named Trail Making TestSecondarysame day Verbal LearningSecondarysame day Verbal FluencySecondarysame day Symbol CodingSecondarysame day Letter-Number Sequencing TaskSecondarysame day
NCT06242535	Start2023	PhaseEarly phase 1	ConditionsDepression and bipolar disorder, Aging, frailty and exercise, Obesity and diabetes, Cardiovascular disease	Participants13	Lead sponsorIndustry	StatusCompleted	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Symbol CodingSecondary6 months Eriksen Flanker TaskSecondary6 months
NCT06236256	Start2024	PhaseNot applicable	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants42	Lead sponsorOther	StatusCompleted	Library tests named Symbol CodingOther outcome12 months
NCT06223204	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants16	Lead sponsorOther	StatusCompleted	Library tests named Symbol CodingSecondarysame day
NCT06122441	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants119	Lead sponsorOther	StatusActive, not recruiting	Library tests named Symbol CodingOther outcome2 years
NCT05997316	Start2023	PhaseNot applicable	ConditionsMild cognitive impairment, Obesity and diabetes	Participants33	Lead sponsorOther	StatusCompleted Results	Library tests named Trail Making TestPrimary12 weeks Verbal LearningPrimary12 weeks Verbal FluencyPrimary12 weeks Digit Span TestPrimary12 weeks Symbol CodingPrimary12 weeks Category FluencyPrimary12 weeks
NCT05794009	Start2022	PhaseNot applicable	ConditionsAging, frailty and exercise, Obesity and diabetes	Participants124	Lead sponsorOther	StatusCompleted	Library tests named Digit Span TestSecondarysame day Symbol CodingSecondarysame day

Questions, answered from the data

How many obesity and diabetes trials use Symbol Coding?

Which tests do obesity and diabetes trials use with Symbol Coding?

The Trail Making Test (26 studies), Verbal Learning (22 studies) and the Digit Span Test (17 studies).

When do obesity and diabetes trials measure Symbol Coding?

Half of the primary outcomes that name Symbol Coding are measured within 12 weeks of the start, and the middle half from the first day to 6 months. 25 primary outcomes give a duration.

How many completed obesity and diabetes trials that use Symbol Coding have reported results?

How the studies are counted

The census counts Symbol Key Game and Symbol Coding as one test family, so this page counts their studies together.

Run Symbol Coding 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.

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Symbol Coding in obesity and diabetes trials: 59 registered studies

Tests named in the same studies

Studies by start year

Phases and study sizes

By phase

Participants per study

When obesity and diabetes trials measure it

Latest time point of each outcome

Status, results, interventions and countries

Status

What they test

Where their sites are

Reported results

The 59 studies

Library tests named most

Conditions

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many obesity and diabetes trials use Symbol Coding?

Which tests do obesity and diabetes trials use with Symbol Coding?

When do obesity and diabetes trials measure Symbol Coding?

How many completed obesity and diabetes trials that use Symbol Coding have reported results?

More on Symbol Coding and obesity and diabetes

Symbol Coding in other conditions

Other tests in obesity and diabetes trials

How the studies are counted

Run Symbol Coding in your trial

Symbol Coding in obesity and diabetes trials: 59 registered studies

Tests named in the same studies

Studies by start year

Phases and study sizes

By phase

Participants per study

When obesity and diabetes trials measure it

Latest time point of each outcome

Status, results, interventions and countries

Status

What they test

Where their sites are

Reported results

The 59 studies

Library tests named most

Conditions

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many obesity and diabetes trials use Symbol Coding?

Which tests do obesity and diabetes trials use with Symbol Coding?

When do obesity and diabetes trials measure Symbol Coding?

How many completed obesity and diabetes trials that use Symbol Coding have reported results?

More on Symbol Coding and obesity and diabetes

Symbol Coding in other conditions

Other tests in obesity and diabetes trials

How the studies are counted

Run Symbol Coding in your trial