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  1. Home
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  3. /Clinical trials
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  5. /Dementia and Alzheimer's
  6. /Delayed Recall Module

Clinical trials data

Delayed Recall Module in dementia and Alzheimer's trials: 71 registered studies

Every registered dementia and Alzheimer's disease study on ClinicalTrials.gov that names Delayed Recall Module 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 dementia and Alzheimer's disease studies name it in an outcome measure
71
Name it in a primary outcome, 24%
17 of 71
Of the condition's 1,673 studies name it, against 1% of all registered studies
4%
Other conditions
Median participants per study
327
By phase
Try Delayed Recall ModuleTry the Week Later Game

Tests named in the same studies

The library tests that dementia and Alzheimer's disease studies naming Delayed Recall Module name most often beside it.
  1. 1

    Cancellation Test31 studies, 6 as a primary outcome

  2. 2

    Category Fluency16 studies, 3 as a primary outcome

  3. 3

    Verbal Fluency14 studies, 1 as a primary outcome

  4. 4

    Symbol Coding12 studies, 3 as a primary outcome

  5. 5

    Trail Making Test10 studies, 5 as a primary outcome

  6. 6

    Digit Span Test8 studies, 2 as a primary outcome

  7. 7

    Short Story Recall7 studies, 2 as a primary outcome

  8. 8

    Picture Naming Test5 studies, 2 as a primary outcome

  9. 9

    Selective Reminding Task5 studies, 0 as a primary outcome

  10. 10

    Free Recall Task4 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.
02000: 0 studies, 0 with a test as a primary outcome20002001: 0 studies, 0 with a test as a primary outcome2002: 0 studies, 0 with a test as a primary outcome2003: 0 studies, 0 with a test as a primary outcome2004: 1 studies, 0 with a test as a primary outcome2005: 1 studies, 1 with a test as a primary outcome20052006: 0 studies, 0 with a test as a primary outcome2007: 1 studies, 0 with a test as a primary outcome2008: 2 studies, 0 with a test as a primary outcome2009: 2 studies, 1 with a test as a primary outcome2010: 2 studies, 1 with a test as a primary outcome20102011: 3 studies, 0 with a test as a primary outcome2012: 5 studies, 2 with a test as a primary outcome2013: 1 studies, 1 with a test as a primary outcome2014: 3 studies, 2 with a test as a primary outcome2015: 4 studies, 1 with a test as a primary outcome20152016: 6 studies, 2 with a test as a primary outcome2017: 7 studies, 1 with a test as a primary outcome2018: 5 studies, 0 with a test as a primary outcome2019: 2 studies, 0 with a test as a primary outcome2020: 2 studies, 0 with a test as a primary outcome20202021: 9 studies, 1 with a test as a primary outcome2022: 3 studies, 0 with a test as a primary outcome2023: 2 studies, 2 with a test as a primary outcome2024: 4 studies, 1 with a test as a primary outcome2025: 4 studies, 1 with a test as a primary outcome20252026: 2 studies, 0 with a test as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

Show as a table
Registered studies by start year
Start yearStudiesA test as a primary outcome
200000
200100
200200
200300
200410
200511
200600
200710
200820
200921
201021
201130
201252
201311
201432
201541
201662
201771
201850
201920
202020
202191
202230
202322
202441
202541
202620

Phases and study sizes

By phase

  • Early phase 11 studies, 0 as a primary outcome
  • Phase 11 studies, 0 as a primary outcome
  • Phase 1/23 studies, 0 as a primary outcome
  • Phase 230 studies, 5 as a primary outcome
  • Phase 2/33 studies, 3 as a primary outcome
  • Phase 325 studies, 7 as a primary outcome
  • Not applicable7 studies, 2 as a primary outcome
  • Observational1 studies, 0 as a primary outcome

Participants per study

1020501002005001,0002,000
  • Phase 2282 median, 85 to 359
  • Phase 31,111 median, 760 to 1,643
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 dementia and Alzheimer's disease study that names Delayed Recall Module, by phase
PhaseStudies with a sizeMedianMiddle half
Phase 23028285 to 359
Phase 3251,111760 to 1,643

When dementia and Alzheimer's trials measure it

Half of the primary outcomes that name Delayed Recall Module are measured within 14 months of the start, and the middle half from 6 months to 18 months. 17 primary outcomes give a duration.

Latest time point of each outcome

  • Within a day1 outcomes, 0 as a primary outcome
  • Up to 4 weeks3 outcomes, 1 as a primary outcome
  • 1 to 3 months5 outcomes, 2 as a primary outcome
  • 3 to 6 months13 outcomes, 4 as a primary outcome
  • 6 to 12 months9 outcomes, 1 as a primary outcome
  • 1 to 2 years35 outcomes, 8 as a primary outcome
  • Over 2 years5 outcomes, 1 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

71 of the 71 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

  • Recruiting5 studies, 0 as a primary outcome
  • Not yet recruiting1 studies, 0 as a primary outcome
  • Active, not recruiting6 studies, 3 as a primary outcome
  • Completed35 studies, 7 as a primary outcome
  • Stopped early22 studies, 7 as a primary outcome
  • Status unknown2 studies, 0 as a primary outcome

What they test

  • Behavioral1 studies, 0 as a primary outcome
  • Drug58 studies, 13 as a primary outcome
  • Device2 studies, 1 as a primary outcome
  • Dietary supplement4 studies, 0 as a primary outcome
  • Procedure1 studies, 0 as a primary outcome
  • Biological5 studies, 1 as a primary outcome
  • Other9 studies, 3 as a primary outcome

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

Where their sites are

  • United States59 studies, 16 as a primary outcome
  • Canada39 studies, 7 as a primary outcome
  • Spain34 studies, 9 as a primary outcome
  • Germany30 studies, 9 as a primary outcome
  • Japan30 studies, 6 as a primary outcome
  • France28 studies, 7 as a primary outcome
  • United Kingdom28 studies, 8 as a primary outcome
  • Australia27 studies, 4 as a primary outcome
  • Italy25 studies, 4 as a primary outcome
  • Poland24 studies, 5 as a primary outcome
  • Sweden18 studies, 2 as a primary outcome
  • South Korea17 studies, 3 as a primary outcome

51 countries in all. A study with sites in several counts in each; 1 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 dementia and Alzheimer's disease studies that name Delayed Recall Module: 32 of 35, 91%

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

Completed dementia and Alzheimer's disease studies that name Delayed Recall Module and every completed study, by how they reported results
ResultsCompleted dementia and Alzheimer's disease studies that name Delayed Recall ModuleEvery completed study
Results on ClinicalTrials.gov and a paper20, 57%776, 10%
Results on ClinicalTrials.gov only7, 20%1,139, 14%
A results paper only5, 14%1,711, 22%
Neither3, 9%4,327, 54%

The 71 studies

Filter by phase, sponsor, status, country, intervention, outcome list, size and start year. Each study links to its record on ClinicalTrials.gov.
ConditionDementia and Alzheimer's
TestDelayed Recall Module

71 studies match. 17 name Delayed Recall Module in a primary outcome. Median size 327 participants. Median time to the primary outcome: 14 months.

Loading 71 studies; the filters turn on when they arrive.

By start year
02.557.5102000: 0 studies, 0 naming Delayed Recall Module in a primary outcome20002001: 0 studies, 0 naming Delayed Recall Module in a primary outcome2002: 0 studies, 0 naming Delayed Recall Module in a primary outcome2003: 0 studies, 0 naming Delayed Recall Module in a primary outcome2004: 1 studies, 0 naming Delayed Recall Module in a primary outcome2005: 1 studies, 1 naming Delayed Recall Module in a primary outcome20052006: 0 studies, 0 naming Delayed Recall Module in a primary outcome2007: 1 studies, 0 naming Delayed Recall Module in a primary outcome2008: 2 studies, 0 naming Delayed Recall Module in a primary outcome2009: 2 studies, 1 naming Delayed Recall Module in a primary outcome2010: 2 studies, 1 naming Delayed Recall Module in a primary outcome20102011: 3 studies, 0 naming Delayed Recall Module in a primary outcome2012: 5 studies, 2 naming Delayed Recall Module in a primary outcome2013: 1 studies, 1 naming Delayed Recall Module in a primary outcome2014: 3 studies, 2 naming Delayed Recall Module in a primary outcome2015: 4 studies, 1 naming Delayed Recall Module in a primary outcome20152016: 6 studies, 2 naming Delayed Recall Module in a primary outcome2017: 7 studies, 1 naming Delayed Recall Module in a primary outcome2018: 5 studies, 0 naming Delayed Recall Module in a primary outcome2019: 2 studies, 0 naming Delayed Recall Module in a primary outcome2020: 2 studies, 0 naming Delayed Recall Module in a primary outcome20202021: 9 studies, 1 naming Delayed Recall Module in a primary outcome2022: 3 studies, 0 naming Delayed Recall Module in a primary outcome2023: 2 studies, 2 naming Delayed Recall Module in a primary outcome2024: 4 studies, 1 naming Delayed Recall Module in a primary outcome2025: 4 studies, 1 naming Delayed Recall Module in a primary outcome20252026: 2 studies, 0 naming Delayed Recall Module in a primary outcome

2026 is partly planned starts.

Show as a table
Matching studies by start year
Start yearStudiesAs a primary outcome
200000
200100
200200
200300
200410
200511
200600
200710
200820
200921
201021
201130
201252
201311
201432
201541
201662
201771
201850
201920
202020
202191
202230
202322
202441
202541
202620

Library tests named most

  • Delayed Recall Module71 studies, 17 as a primary outcome
  • Cancellation Test31 studies, 6 as a primary outcome
  • Category Fluency16 studies, 3 as a primary outcome
  • Verbal Fluency14 studies, 1 as a primary outcome
  • Symbol Coding12 studies, 3 as a primary outcome
  • Trail Making Test10 studies, 5 as a primary outcome
  • Digit Span Test8 studies, 2 as a primary outcome
  • Short Story Recall7 studies, 2 as a primary outcome
  • Picture Naming Test5 studies, 2 as a primary outcome
  • Selective Reminding Task5 studies, 0 as a primary outcome

Conditions

  • Dementia and Alzheimer's71 studies, 17 as a primary outcome
  • Mild cognitive impairment10 studies, 4 as a primary outcome
  • Aging, frailty and exercise3 studies, 1 as a primary outcome
  • Parkinson's disease2 studies, 0 as a primary outcome
  • Multiple sclerosis1 study, 0 as a primary outcome
  • Cancer1 study, 0 as a primary outcome
  • Obesity and diabetes1 study, 0 as a primary outcome
  • Hearing loss1 study, 1 as a primary outcome
  • Delirium, surgery and intensive care1 study, 1 as a primary outcome

Phases

Participants

Lead sponsor: industry 54, NIH 1, other 16. Interventional 70, observational 1.

As a primary outcomeSecondary or other outcomeDelayed Recall Module

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.
StudyStartPhaseConditionsParticipantsLead sponsorStatusLibrary tests named, with the latest time point
NCT07842146Start2026PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants60Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal FluencySecondary11 months
  • Symbol CodingSecondary11 months
  • Category FluencySecondary11 months
  • Delayed Recall ModuleSecondary11 months
NCT07642726Start2018PhaseObservationalConditionsDementia and Alzheimer's, Aging, frailty and exerciseParticipants276Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestPrimary12 months
  • Verbal FluencySecondary12 months
  • Delayed Recall ModuleSecondary12 months
NCT07392723Start2025PhasePhase 2ConditionsDementia and Alzheimer's, Aging, frailty and exerciseParticipants20Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary6 months
  • Digit Span TestSecondary6 months
  • Category FluencySecondary6 months
  • Delayed Recall ModuleSecondary6 months
NCT07385937Start2026PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants150Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestSecondary18 months
  • Verbal FluencySecondary18 months
  • Digit Span TestSecondary18 months
  • Category FluencySecondary18 months
  • Clock Drawing TaskSecondary18 months
  • Cancellation TestSecondary18 months
  • Delayed Recall ModuleSecondary18 months
NCT07251023Start2025PhasePhase 3ConditionsDementia and Alzheimer'sParticipants450Lead sponsorIndustryStatusRecruitingLibrary tests named
  • Delayed Recall ModuleOther outcome12 months
NCT07033494Start2025PhasePhase 2ConditionsDementia and Alzheimer'sParticipants340Lead sponsorIndustryStatusRecruitingLibrary tests named
  • Delayed Recall ModuleSecondary23 months
NCT06709014Start2025PhasePhase 3ConditionsDementia and Alzheimer'sParticipants760Lead sponsorIndustryStatusActive, not recruitingLibrary tests named
  • Cancellation TestPrimary18 months
  • Delayed Recall ModulePrimary18 months
  • Free Recall TaskPrimary18 months
NCT06538116Start2024PhasePhase 2ConditionsDementia and Alzheimer'sParticipants304Lead sponsorIndustryStatusCompletedLibrary tests named
  • Verbal FluencySecondary6 months
  • Symbol CodingSecondary6 months
  • Category FluencySecondary6 months
  • Cancellation TestSecondary6 months
  • Delayed Recall ModuleSecondary6 months
NCT06335173Start2024PhasePhase 2ConditionsDementia and Alzheimer'sParticipants542Lead sponsorIndustryStatusActive, not recruitingLibrary tests named
  • Cancellation TestSecondary18 months
  • Delayed Recall ModuleSecondary18 months
NCT06223360Start2024PhasePhase 2ConditionsDementia and Alzheimer'sParticipants406Lead sponsorOtherStatusActive, not recruitingLibrary tests named
  • Delayed Recall ModulePrimary17 months
NCT06112639Start2024PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairment, Multiple sclerosis, CancerParticipants192Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary6 months
  • Stroop Color-Word TestSecondary6 months
  • Verbal FluencySecondary6 months
  • Symbol CodingSecondary6 months
  • Category FluencySecondary6 months
  • Selective Reminding TaskSecondary6 months
  • Delayed Recall ModuleSecondary6 months
NCT05771428Start2023PhasePhase 2ConditionsDementia and Alzheimer'sParticipants263Lead sponsorIndustryStatusCompleted

Results

Library tests named
  • Cancellation TestPrimary12 weeks
  • Delayed Recall ModulePrimary12 weeks
NCT05532657Start2023PhasePhase 3ConditionsDementia and Alzheimer's, Mild cognitive impairment, Aging, frailty and exercise, Hearing lossParticipants629Lead sponsorOtherStatusActive, not recruitingLibrary tests named
  • Trail Making TestPrimary6 years
  • Digit Span TestPrimary6 years
  • Symbol CodingPrimary6 years
  • Category FluencyPrimary6 years
  • Picture Naming TestPrimary6 years
  • Short Story RecallPrimary6 years
  • Delayed Recall ModulePrimary6 years
NCT05399888Start2022PhasePhase 2ConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants416Lead sponsorIndustryStatusActive, not recruitingLibrary tests named
  • Delayed Recall ModuleSecondary17 months
NCT05310071Start2022PhasePhase 3ConditionsDementia and Alzheimer'sParticipants1,027Lead sponsorIndustryStatusStopped early

Results

Library tests named
  • Delayed Recall ModuleSecondary2 years
NCT05143528Start2022PhasePhase 3ConditionsDementia and Alzheimer'sParticipants1,275Lead sponsorIndustryStatusStatus unknownLibrary tests named
  • Delayed Recall ModuleSecondary17 months
NCT05063539Start2021PhasePhase 2ConditionsDementia and Alzheimer'sParticipants327Lead sponsorIndustryStatusCompleted

ResultsPaper

Library tests named
  • Cancellation TestSecondary17 months
  • Delayed Recall ModuleSecondary17 months
NCT04997681Start2021PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants60Lead sponsorOtherStatusCompleted

Paper

Library tests named
  • Trail Making TestSecondary10 months
  • Verbal FluencySecondary10 months
  • Digit Span TestSecondary10 months
  • Category FluencySecondary10 months
  • Picture Naming TestSecondary10 months
  • Short Story RecallSecondary10 months
  • Delayed Recall ModuleSecondary10 months
NCT04777396Start2021PhasePhase 3ConditionsDementia and Alzheimer'sParticipants1,840Lead sponsorIndustryStatusCompleted

Paper

Library tests named
  • Category FluencySecondary2 years
  • Clock Drawing TaskSecondary2 years
  • Delayed Recall ModuleSecondary2 years
NCT04770220Start2021PhasePhase 3ConditionsDementia and Alzheimer'sParticipants325Lead sponsorIndustryStatusCompleted

ResultsPaper 1Paper 2

Library tests named
  • Cancellation TestPrimary18 months
  • Delayed Recall ModulePrimary18 months
NCT04640077Start2020PhasePhase 2ConditionsDementia and Alzheimer'sParticipants95Lead sponsorIndustryStatusCompleted

ResultsPaper 1Paper 2

Library tests named
  • Cancellation TestSecondary17 months
  • Delayed Recall ModuleSecondary17 months
NCT04619420Start2021PhasePhase 2ConditionsDementia and Alzheimer'sParticipants523Lead sponsorIndustryStatusStopped early

ResultsPaper

Library tests named
  • Digit Span TestSecondary20 months
  • Category FluencySecondary20 months
  • Picture Naming TestSecondary20 months
  • Short Story RecallSecondary20 months
  • Cancellation TestSecondary2 years
  • Delayed Recall ModuleSecondary2 years
  • Free Recall TaskSecondary2 years
NCT04592874Start2021PhasePhase 2ConditionsDementia and Alzheimer'sParticipants356Lead sponsorIndustryStatusCompleted

ResultsPaper 1Paper 2

Library tests named
  • Cancellation TestSecondary22 months
  • Delayed Recall ModuleSecondary22 months
  • Free Recall TaskSecondary22 months
NCT04437511Start2020PhasePhase 3ConditionsDementia and Alzheimer'sParticipants1,736Lead sponsorIndustryStatusActive, not recruiting

ResultsPaper 1Paper 2Paper 3Paper 4Paper 5Paper 6Paper 7Paper 8Paper 9Paper 10Paper 11Paper 12Paper 13

Library tests named
  • Cancellation TestSecondary17 months
  • Delayed Recall ModuleSecondary17 months
NCT04421014Start2021PhaseNot applicableConditionsDementia and Alzheimer's, Obesity and diabetesParticipants99Lead sponsorNIHStatusCompleted

Results

Library tests named
  • Symbol CodingSecondary4 weeks
  • Eriksen Flanker TaskSecondary4 weeks
  • Short Story RecallSecondary4 weeks
  • Selective Reminding TaskSecondary4 weeks
  • Delayed Recall ModuleSecondary4 weeks

Page 1 of 3

Questions, answered from the data

How many dementia and Alzheimer's trials use Delayed Recall Module?

71 registered dementia and Alzheimer's disease studies on ClinicalTrials.gov name it in an outcome measure, 17 of them in a primary outcome: 4% of the condition's 1,673 studies with a cognitive outcome, against 1% of all of them. It is the 11th most named test in dementia and Alzheimer's trials.

Which tests do dementia and Alzheimer's trials use with Delayed Recall Module?

The Cancellation Test (31 studies), Category Fluency (16 studies) and Verbal Fluency (14 studies).

How many participants do phase 2 dementia and Alzheimer's trials that use Delayed Recall Module enroll?

Half of the phase 2 studies that name it enroll 282 participants or fewer, and the middle half enroll 85 to 359. 30 of them give a size.

When do dementia and Alzheimer's trials measure Delayed Recall Module?

Half of the primary outcomes that name Delayed Recall Module are measured within 14 months of the start, and the middle half from 6 months to 18 months. 17 primary outcomes give a duration.

How many completed dementia and Alzheimer's trials that use Delayed Recall Module have reported results?

32 of the 35 completed studies that name it, 91%, have reported results: 27 posted them on ClinicalTrials.gov, 25 have a results paper linked to the registry record, and 20 did both. The other 3 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.

More on Delayed Recall Module and dementia and Alzheimer's disease

  • Every cognitive test in dementia and Alzheimer's trials: 1,673 studies
  • Delayed Recall Module in all clinical trials: 159 studies

Other tests in dementia and Alzheimer's trials

  • Trail Making Test273
  • Verbal Fluency248
  • Verbal Learning224
  • Digit Span Test181
  • Category Fluency167
  • Symbol Coding117
  • Stroop Color-Word Test116
  • Picture Naming Test104
  • Short Story Recall91
  • Selective Reminding Task76
  • Clock Drawing Task69
  • Complex Figure Copy and Recall53

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 Delayed Recall Module and Week Later Game as one test family, so this page counts their studies together.

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