Clinical trials data

Digit Span Test in obesity and diabetes trials: 64 registered studies

Every registered obesity and diabetes study on ClinicalTrials.gov that names the Digit Span 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: 64
Name it in a primary outcome, 41%: 26 of 64
Of the condition's 627 studies name it, against 10% of all registered studies: 10%; Other conditions
Median participants per study: 76; By phase

Try the Digit Span Test

Tests named in the same studies

The library tests that obesity and diabetes studies naming the Digit Span Test name most often beside it.

1
Verbal Learning30 studies, 15 as a primary outcome
2
Trail Making Test25 studies, 13 as a primary outcome
3
Verbal Fluency18 studies, 7 as a primary outcome
4
Symbol Coding17 studies, 11 as a primary outcome
5
Stroop Color-Word Test17 studies, 8 as a primary outcome
6
Category Fluency13 studies, 6 as a primary outcome
7
Short Story Recall9 studies, 3 as a primary outcome
8
Matrix Reasoning8 studies, 4 as a primary outcome
9
Letter-Number Sequencing Task6 studies, 5 as a primary outcome
10
Go/No-Go Task6 studies, 4 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	0	0
2009	1	1
2010	2	1
2011	0	0
2012	0	0
2013	2	1
2014	3	0
2015	4	1
2016	1	1
2017	1	0
2018	6	5
2019	4	1
2020	3	1
2021	4	0
2022	11	4
2023	4	2
2024	5	2
2025	4	2
2026	7	2

Phases and study sizes

By phase

Phase 14 studies, 2 as a primary outcome
Phase 23 studies, 0 as a primary outcome
Phase 33 studies, 2 as a primary outcome
Phase 44 studies, 1 as a primary outcome
Not applicable38 studies, 14 as a primary outcome
Observational12 studies, 7 as a primary outcome

Participants per study

Not applicable53 median, 39 to 87
Observational150 median, 92 to 517

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 the Digit Span Test, by phase
Phase	Studies with a size	Median	Middle half
Not applicable	38	53	39 to 87
Observational	12	150	92 to 517

When obesity and diabetes trials measure it

Half of the primary outcomes that name the Digit Span Test are measured within 7 weeks of the start, and the middle half from the first day to 4 months. 24 primary outcomes give a duration.

Latest time point of each outcome

Within a day16 outcomes, 8 as a primary outcome
Up to 4 weeks6 outcomes, 3 as a primary outcome
1 to 3 months16 outcomes, 7 as a primary outcome
3 to 6 months12 outcomes, 1 as a primary outcome
6 to 12 months5 outcomes, 3 as a primary outcome
1 to 2 years1 outcomes, 0 as a primary outcome
Over 2 years3 outcomes, 2 as a primary outcome
No duration given5 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

59 of the 64 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting11 studies, 4 as a primary outcome
Not yet recruiting4 studies, 1 as a primary outcome
Active, not recruiting4 studies, 2 as a primary outcome
Completed39 studies, 17 as a primary outcome
Stopped early2 studies, 1 as a primary outcome
Status unknown4 studies, 1 as a primary outcome

What they test

Behavioral16 studies, 4 as a primary outcome
Drug11 studies, 4 as a primary outcome
Device5 studies, 2 as a primary outcome
Dietary supplement8 studies, 3 as a primary outcome
Procedure2 studies, 0 as a primary outcome
Combination product1 studies, 0 as a primary outcome
Other23 studies, 13 as a primary outcome
None given7 studies, 5 as a primary outcome

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

20 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 obesity and diabetes studies that name the Digit Span Test: 23 of 39, 59%

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

Completed obesity and diabetes studies that name the Digit Span Test and every completed study, by how they reported results
Results	Completed obesity and diabetes studies that name the Digit Span Test	Every completed study
Results on ClinicalTrials.gov and a paper	3, 8%	776, 10%
Results on ClinicalTrials.gov only	8, 21%	1,139, 14%
A results paper only	12, 31%	1,711, 22%
Neither	16, 41%	4,327, 54%

The 64 studies

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

64 studies match. 26 name the Digit Span Test in a primary outcome. Median size 76 participants. Median time to the primary outcome: 7 weeks.

Loading 64 studies; the filters turn on when they arrive.

By start year

2026 is partly planned starts. Not shown: 1 planned to start after 2026.

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	0	0
2009	1	1
2010	2	1
2011	0	0
2012	0	0
2013	2	1
2014	3	0
2015	4	1
2016	1	1
2017	1	0
2018	6	5
2019	4	1
2020	3	1
2021	4	0
2022	11	4
2023	4	2
2024	5	2
2025	4	2
2026	7	2

Library tests named most

Largest condition groups

Obesity and diabetes64 studies, 26 as a primary outcome
Cardiovascular disease7 studies, 3 as a primary outcome
Aging, frailty and exercise6 studies, 2 as a primary outcome
Dementia and Alzheimer's4 studies, 2 as a primary outcome
Mild cognitive impairment4 studies, 1 as a primary outcome
Depression and bipolar disorder3 studies, 1 as a primary outcome
Anxiety, PTSD and OCD2 studies, 1 as a primary outcome
Stroke1 study, 1 as a primary outcome
Parkinson's disease1 study, 0 as a primary outcome
ADHD1 study, 0 as a primary outcome
Cancer1 study, 0 as a primary outcome
Sleep and sleep disorders1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 2, other 62. Interventional 52, observational 12.

As a primary outcomeSecondary or other outcomeThe Digit Span Test

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
NCT07862452	Start2027	PhaseNot applicable	ConditionsObesity and diabetes, Cardiovascular disease	Participants400	Lead sponsorOther	StatusNot yet recruiting	Library tests named Digit Span TestPrimary4 weeks Matrix ReasoningPrimary4 weeks Delay DiscountingPrimary4 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
NCT07650318	Start2026	PhaseNot applicable	ConditionsMild cognitive impairment, Obesity and diabetes	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Digit Span TestSecondary6 months Category FluencySecondary6 months Picture Naming TestSecondary6 months Short Story RecallSecondary6 months Delayed Recall ModuleSecondary6 months
NCT07642518	Start2026	PhaseNot applicable	ConditionsMild cognitive impairment, Obesity and diabetes	Participants38	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Digit Span TestSecondary6 months Category FluencySecondary6 months Picture Naming TestSecondary6 months Short Story RecallSecondary6 months
NCT07592546	Start2026	PhasePhase 4	ConditionsObesity and diabetes	Participants240	Lead sponsorOther	StatusRecruiting	Library tests named Digit Span TestSecondary Matrix ReasoningSecondary Delay DiscountingSecondary Line Angle MatchingSecondary
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
NCT07164768	Start2024	PhaseObservational	ConditionsObesity and diabetes	Participants400	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary3 years Verbal LearningPrimary3 years Verbal FluencyPrimary3 years Digit Span TestPrimary3 years Category FluencyPrimary3 years Card Sorting Test (Berg)Primary3 years Matrix ReasoningPrimary3 years Cancellation TestPrimary3 years Simple Reaction TimePrimary3 years Letter-Number Sequencing TaskPrimary3 years Finger Tapping TaskPrimary3 years Symbol Scan TaskPrimary3 years Token Commands TaskPrimary3 years
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
NCT06931730	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants240	Lead sponsorOther	StatusRecruiting	Library tests named Digit Span TestSecondary5 months N-Back TaskSecondary5 months Continuous Performance TestSecondary5 months Matrix ReasoningSecondary Corsi Block-Tapping TestSecondary5 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
NCT06867198	Start2025	PhaseNot applicable	ConditionsObesity and diabetes, Cardiovascular disease	Participants72	Lead sponsorOther	StatusRecruiting	Library tests named Verbal LearningSecondary6 months Verbal FluencySecondary6 months Digit Span TestSecondary6 months Vocabulary TestSecondary6 months Face-name Memory TaskSecondary6 months
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
NCT06735651	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants30	Lead sponsorOther	StatusRecruiting	Library tests named Verbal LearningSecondary6 weeks Verbal FluencySecondary6 weeks Digit Span TestSecondary6 weeks Vocabulary TestSecondarysame day Face-name Memory TaskSecondary6 months
NCT06735599	Start2024	PhaseNot applicable	ConditionsObesity and diabetes, Cardiovascular disease	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Verbal LearningSecondary8 weeks Verbal FluencySecondary8 weeks Digit Span TestSecondary8 weeks Face-name Memory TaskSecondary8 weeks
NCT06649981	Start2025	PhasePhase 1	ConditionsObesity and diabetes	Participants80	Lead sponsorOther	StatusActive, not recruiting	Library tests named Trail Making TestSecondary5 months Verbal FluencySecondary5 months Digit Span TestSecondary5 months
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
NCT05865912	Start2023	PhaseNot applicable	ConditionsObesity and diabetes	Participants52	Lead sponsorOther	StatusCompleted Paper	Library tests named Digit Span TestSecondary8 weeks Go/No-Go TaskSecondary8 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
NCT05709847	Start2023	PhaseNot applicable	ConditionsObesity and diabetes	Participants70	Lead sponsorOther	StatusStatus unknown	Library tests named Verbal LearningPrimary8 weeks Digit Span TestSecondarysame day Symbol CodingSecondary8 weeks Corsi Block-Tapping TestSecondary8 weeks
NCT05658354	Start2022	PhaseNot applicable	ConditionsObesity and diabetes	Participants50	Lead sponsorOther	StatusCompleted	Library tests named Verbal LearningPrimary12 months Verbal FluencyPrimary12 months Digit Span TestPrimary12 months N-Back TaskPrimary12 months Continuous Performance TestPrimary12 months Eriksen Flanker TaskPrimary12 months
NCT05651243	Start2022	PhaseNot applicable	ConditionsObesity and diabetes	Participants20	Lead sponsorOther	StatusCompleted Paper	Library tests named Stroop Color-Word TestPrimarysame day Digit Span TestPrimarysame day Go/No-Go TaskPrimarysame day Task Switching TestPrimarysame day
NCT05586386	Start2020	PhasePhase 1	ConditionsObesity and diabetes	Participants60	Lead sponsorOther	StatusCompleted	Library tests named Digit Span TestPrimary4 weeks

Questions, answered from the data

How many obesity and diabetes trials use the Digit Span Test?

64 registered obesity and diabetes studies on ClinicalTrials.gov name it in an outcome measure, 26 of them in a primary outcome: 10% of the condition's 627 studies with a cognitive outcome, against 10% of all of them. It is the 4th most named test in obesity and diabetes trials.

Which tests do obesity and diabetes trials use with the Digit Span Test?

Verbal Learning (30 studies), the Trail Making Test (25 studies) and Verbal Fluency (18 studies).

When do obesity and diabetes trials measure the Digit Span Test?

Half of the primary outcomes that name the Digit Span Test are measured within 7 weeks of the start, and the middle half from the first day to 4 months. 24 primary outcomes give a duration.

How many completed obesity and diabetes trials that use the Digit Span Test have reported results?

23 of the 39 completed studies that name it, 59%, have reported results: 11 posted them on ClinicalTrials.gov, 15 have a results paper linked to the registry record, and 3 did both. The other 16 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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Clinical trials data

Digit Span Test in obesity and diabetes trials: 64 registered studies

Registered obesity and diabetes studies name it in an outcome measure: 64
Name it in a primary outcome, 41%: 26 of 64
Of the condition's 627 studies name it, against 10% of all registered studies: 10%; Other conditions
Median participants per study: 76; By phase

Try the Digit Span Test

Tests named in the same studies

The library tests that obesity and diabetes studies naming the Digit Span Test name most often beside it.

1
Verbal Learning30 studies, 15 as a primary outcome
2
Trail Making Test25 studies, 13 as a primary outcome
3
Verbal Fluency18 studies, 7 as a primary outcome
4
Symbol Coding17 studies, 11 as a primary outcome
5
Stroop Color-Word Test17 studies, 8 as a primary outcome
6
Category Fluency13 studies, 6 as a primary outcome
7
Short Story Recall9 studies, 3 as a primary outcome
8
Matrix Reasoning8 studies, 4 as a primary outcome
9
Letter-Number Sequencing Task6 studies, 5 as a primary outcome
10
Go/No-Go Task6 studies, 4 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	0	0
2009	1	1
2010	2	1
2011	0	0
2012	0	0
2013	2	1
2014	3	0
2015	4	1
2016	1	1
2017	1	0
2018	6	5
2019	4	1
2020	3	1
2021	4	0
2022	11	4
2023	4	2
2024	5	2
2025	4	2
2026	7	2

Phases and study sizes

By phase

Phase 14 studies, 2 as a primary outcome
Phase 23 studies, 0 as a primary outcome
Phase 33 studies, 2 as a primary outcome
Phase 44 studies, 1 as a primary outcome
Not applicable38 studies, 14 as a primary outcome
Observational12 studies, 7 as a primary outcome

Participants per study

Not applicable53 median, 39 to 87
Observational150 median, 92 to 517

Show as a table

Participants per obesity and diabetes study that names the Digit Span Test, by phase
Phase	Studies with a size	Median	Middle half
Not applicable	38	53	39 to 87
Observational	12	150	92 to 517

When obesity and diabetes trials measure it

Half of the primary outcomes that name the Digit Span Test are measured within 7 weeks of the start, and the middle half from the first day to 4 months. 24 primary outcomes give a duration.

Latest time point of each outcome

Within a day16 outcomes, 8 as a primary outcome
Up to 4 weeks6 outcomes, 3 as a primary outcome
1 to 3 months16 outcomes, 7 as a primary outcome
3 to 6 months12 outcomes, 1 as a primary outcome
6 to 12 months5 outcomes, 3 as a primary outcome
1 to 2 years1 outcomes, 0 as a primary outcome
Over 2 years3 outcomes, 2 as a primary outcome
No duration given5 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

59 of the 64 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

Recruiting11 studies, 4 as a primary outcome
Not yet recruiting4 studies, 1 as a primary outcome
Active, not recruiting4 studies, 2 as a primary outcome
Completed39 studies, 17 as a primary outcome
Stopped early2 studies, 1 as a primary outcome
Status unknown4 studies, 1 as a primary outcome

What they test

Behavioral16 studies, 4 as a primary outcome
Drug11 studies, 4 as a primary outcome
Device5 studies, 2 as a primary outcome
Dietary supplement8 studies, 3 as a primary outcome
Procedure2 studies, 0 as a primary outcome
Combination product1 studies, 0 as a primary outcome
Other23 studies, 13 as a primary outcome
None given7 studies, 5 as a primary outcome

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

20 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 obesity and diabetes studies that name the Digit Span Test: 23 of 39, 59%

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

Completed obesity and diabetes studies that name the Digit Span Test and every completed study, by how they reported results
Results	Completed obesity and diabetes studies that name the Digit Span Test	Every completed study
Results on ClinicalTrials.gov and a paper	3, 8%	776, 10%
Results on ClinicalTrials.gov only	8, 21%	1,139, 14%
A results paper only	12, 31%	1,711, 22%
Neither	16, 41%	4,327, 54%

The 64 studies

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

64 studies match. 26 name the Digit Span Test in a primary outcome. Median size 76 participants. Median time to the primary outcome: 7 weeks.

Loading 64 studies; the filters turn on when they arrive.

By start year

2026 is partly planned starts. Not shown: 1 planned to start after 2026.

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	0	0
2009	1	1
2010	2	1
2011	0	0
2012	0	0
2013	2	1
2014	3	0
2015	4	1
2016	1	1
2017	1	0
2018	6	5
2019	4	1
2020	3	1
2021	4	0
2022	11	4
2023	4	2
2024	5	2
2025	4	2
2026	7	2

Library tests named most

Largest condition groups

Obesity and diabetes64 studies, 26 as a primary outcome
Cardiovascular disease7 studies, 3 as a primary outcome
Aging, frailty and exercise6 studies, 2 as a primary outcome
Dementia and Alzheimer's4 studies, 2 as a primary outcome
Mild cognitive impairment4 studies, 1 as a primary outcome
Depression and bipolar disorder3 studies, 1 as a primary outcome
Anxiety, PTSD and OCD2 studies, 1 as a primary outcome
Stroke1 study, 1 as a primary outcome
Parkinson's disease1 study, 0 as a primary outcome
ADHD1 study, 0 as a primary outcome
Cancer1 study, 0 as a primary outcome
Sleep and sleep disorders1 study, 0 as a primary outcome

Phases

Participants

Lead sponsor: industry 2, other 62. Interventional 52, observational 12.

As a primary outcomeSecondary or other outcomeThe Digit Span Test

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
NCT07862452	Start2027	PhaseNot applicable	ConditionsObesity and diabetes, Cardiovascular disease	Participants400	Lead sponsorOther	StatusNot yet recruiting	Library tests named Digit Span TestPrimary4 weeks Matrix ReasoningPrimary4 weeks Delay DiscountingPrimary4 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
NCT07650318	Start2026	PhaseNot applicable	ConditionsMild cognitive impairment, Obesity and diabetes	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Digit Span TestSecondary6 months Category FluencySecondary6 months Picture Naming TestSecondary6 months Short Story RecallSecondary6 months Delayed Recall ModuleSecondary6 months
NCT07642518	Start2026	PhaseNot applicable	ConditionsMild cognitive impairment, Obesity and diabetes	Participants38	Lead sponsorOther	StatusNot yet recruiting	Library tests named Trail Making TestSecondary6 months Stroop Color-Word TestSecondary6 months Digit Span TestSecondary6 months Category FluencySecondary6 months Picture Naming TestSecondary6 months Short Story RecallSecondary6 months
NCT07592546	Start2026	PhasePhase 4	ConditionsObesity and diabetes	Participants240	Lead sponsorOther	StatusRecruiting	Library tests named Digit Span TestSecondary Matrix ReasoningSecondary Delay DiscountingSecondary Line Angle MatchingSecondary
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
NCT07164768	Start2024	PhaseObservational	ConditionsObesity and diabetes	Participants400	Lead sponsorOther	StatusRecruiting	Library tests named Stroop Color-Word TestPrimary3 years Verbal LearningPrimary3 years Verbal FluencyPrimary3 years Digit Span TestPrimary3 years Category FluencyPrimary3 years Card Sorting Test (Berg)Primary3 years Matrix ReasoningPrimary3 years Cancellation TestPrimary3 years Simple Reaction TimePrimary3 years Letter-Number Sequencing TaskPrimary3 years Finger Tapping TaskPrimary3 years Symbol Scan TaskPrimary3 years Token Commands TaskPrimary3 years
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
NCT06931730	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants240	Lead sponsorOther	StatusRecruiting	Library tests named Digit Span TestSecondary5 months N-Back TaskSecondary5 months Continuous Performance TestSecondary5 months Matrix ReasoningSecondary Corsi Block-Tapping TestSecondary5 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
NCT06867198	Start2025	PhaseNot applicable	ConditionsObesity and diabetes, Cardiovascular disease	Participants72	Lead sponsorOther	StatusRecruiting	Library tests named Verbal LearningSecondary6 months Verbal FluencySecondary6 months Digit Span TestSecondary6 months Vocabulary TestSecondary6 months Face-name Memory TaskSecondary6 months
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
NCT06735651	Start2024	PhaseNot applicable	ConditionsObesity and diabetes	Participants30	Lead sponsorOther	StatusRecruiting	Library tests named Verbal LearningSecondary6 weeks Verbal FluencySecondary6 weeks Digit Span TestSecondary6 weeks Vocabulary TestSecondarysame day Face-name Memory TaskSecondary6 months
NCT06735599	Start2024	PhaseNot applicable	ConditionsObesity and diabetes, Cardiovascular disease	Participants40	Lead sponsorOther	StatusRecruiting	Library tests named Verbal LearningSecondary8 weeks Verbal FluencySecondary8 weeks Digit Span TestSecondary8 weeks Face-name Memory TaskSecondary8 weeks
NCT06649981	Start2025	PhasePhase 1	ConditionsObesity and diabetes	Participants80	Lead sponsorOther	StatusActive, not recruiting	Library tests named Trail Making TestSecondary5 months Verbal FluencySecondary5 months Digit Span TestSecondary5 months
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
NCT05865912	Start2023	PhaseNot applicable	ConditionsObesity and diabetes	Participants52	Lead sponsorOther	StatusCompleted Paper	Library tests named Digit Span TestSecondary8 weeks Go/No-Go TaskSecondary8 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
NCT05709847	Start2023	PhaseNot applicable	ConditionsObesity and diabetes	Participants70	Lead sponsorOther	StatusStatus unknown	Library tests named Verbal LearningPrimary8 weeks Digit Span TestSecondarysame day Symbol CodingSecondary8 weeks Corsi Block-Tapping TestSecondary8 weeks
NCT05658354	Start2022	PhaseNot applicable	ConditionsObesity and diabetes	Participants50	Lead sponsorOther	StatusCompleted	Library tests named Verbal LearningPrimary12 months Verbal FluencyPrimary12 months Digit Span TestPrimary12 months N-Back TaskPrimary12 months Continuous Performance TestPrimary12 months Eriksen Flanker TaskPrimary12 months
NCT05651243	Start2022	PhaseNot applicable	ConditionsObesity and diabetes	Participants20	Lead sponsorOther	StatusCompleted Paper	Library tests named Stroop Color-Word TestPrimarysame day Digit Span TestPrimarysame day Go/No-Go TaskPrimarysame day Task Switching TestPrimarysame day
NCT05586386	Start2020	PhasePhase 1	ConditionsObesity and diabetes	Participants60	Lead sponsorOther	StatusCompleted	Library tests named Digit Span TestPrimary4 weeks

Questions, answered from the data

How many obesity and diabetes trials use the Digit Span Test?

Which tests do obesity and diabetes trials use with the Digit Span Test?

Verbal Learning (30 studies), the Trail Making Test (25 studies) and Verbal Fluency (18 studies).

When do obesity and diabetes trials measure the Digit Span Test?

Half of the primary outcomes that name the Digit Span Test are measured within 7 weeks of the start, and the middle half from the first day to 4 months. 24 primary outcomes give a duration.

How many completed obesity and diabetes trials that use the Digit Span Test have reported results?

How the studies are counted

Run the Digit Span Test in your trial

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Digit Span Test in obesity and diabetes trials: 64 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 64 studies

Library tests named most

Largest condition groups

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many obesity and diabetes trials use the Digit Span Test?

Which tests do obesity and diabetes trials use with the Digit Span Test?

When do obesity and diabetes trials measure the Digit Span Test?

How many completed obesity and diabetes trials that use the Digit Span Test have reported results?

More on the Digit Span Test and obesity and diabetes

The Digit Span Test in other conditions

Other tests in obesity and diabetes trials

How the studies are counted

Run the Digit Span Test in your trial

Digit Span Test in obesity and diabetes trials: 64 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 64 studies

Library tests named most

Largest condition groups

Phases

Participants

The studies, newest registration first

Questions, answered from the data

How many obesity and diabetes trials use the Digit Span Test?

Which tests do obesity and diabetes trials use with the Digit Span Test?

When do obesity and diabetes trials measure the Digit Span Test?

How many completed obesity and diabetes trials that use the Digit Span Test have reported results?

More on the Digit Span Test and obesity and diabetes

The Digit Span Test in other conditions

Other tests in obesity and diabetes trials

How the studies are counted

Run the Digit Span Test in your trial