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  1. Home
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  5. /Dementia and Alzheimer's
  6. /Selective Reminding Task

Clinical trials data

Selective Reminding Task in dementia and Alzheimer's trials: 76 registered studies

Every registered dementia and Alzheimer's disease study on ClinicalTrials.gov that names the Selective Reminding Task 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
76
Name it in a primary outcome, 45%
34 of 76
Of the condition's 1,673 studies name it, against 1% of all registered studies
5%
Other conditions
Median participants per study
84
By phase
Try the Selective Reminding Task

Tests named in the same studies

The library tests that dementia and Alzheimer's disease studies naming the Selective Reminding Task name most often beside it.
  1. 1

    Trail Making Test28 studies, 8 as a primary outcome

  2. 2

    Symbol Coding24 studies, 10 as a primary outcome

  3. 3

    Category Fluency23 studies, 4 as a primary outcome

  4. 4

    Short Story Recall21 studies, 10 as a primary outcome

  5. 5

    Verbal Fluency20 studies, 6 as a primary outcome

  6. 6

    Digit Span Test15 studies, 3 as a primary outcome

  7. 7

    Stroop Color-Word Test14 studies, 8 as a primary outcome

  8. 8

    Picture Naming Test12 studies, 3 as a primary outcome

  9. 9

    Clock Drawing Task8 studies, 2 as a primary outcome

  10. 10

    Matrix Reasoning6 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: 1 studies, 1 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: 0 studies, 0 with a test as a primary outcome2005: 0 studies, 0 with a test as a primary outcome20052006: 1 studies, 1 with a test as a primary outcome2007: 0 studies, 0 with a test as a primary outcome2008: 3 studies, 2 with a test as a primary outcome2009: 0 studies, 0 with a test as a primary outcome2010: 5 studies, 2 with a test as a primary outcome20102011: 1 studies, 1 with a test as a primary outcome2012: 4 studies, 2 with a test as a primary outcome2013: 6 studies, 3 with a test as a primary outcome2014: 3 studies, 1 with a test as a primary outcome2015: 3 studies, 2 with a test as a primary outcome20152016: 1 studies, 0 with a test as a primary outcome2017: 3 studies, 1 with a test as a primary outcome2018: 3 studies, 2 with a test as a primary outcome2019: 7 studies, 3 with a test as a primary outcome2020: 1 studies, 0 with a test as a primary outcome20202021: 8 studies, 2 with a test as a primary outcome2022: 7 studies, 3 with a test as a primary outcome2023: 5 studies, 2 with a test as a primary outcome2024: 7 studies, 3 with a test as a primary outcome2025: 4 studies, 2 with a test as a primary outcome20252026: 3 studies, 1 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
200111
200200
200300
200400
200500
200611
200700
200832
200900
201052
201111
201242
201363
201431
201532
201610
201731
201832
201973
202010
202182
202273
202352
202473
202542
202631

Phases and study sizes

By phase

  • Early phase 13 studies, 0 as a primary outcome
  • Phase 13 studies, 1 as a primary outcome
  • Phase 1/23 studies, 0 as a primary outcome
  • Phase 213 studies, 5 as a primary outcome
  • Phase 2/35 studies, 3 as a primary outcome
  • Phase 35 studies, 1 as a primary outcome
  • Phase 44 studies, 2 as a primary outcome
  • Not applicable29 studies, 14 as a primary outcome
  • Observational11 studies, 8 as a primary outcome

Participants per study

1020501002005001,000
  • Phase 263 median, 47 to 139
  • Not applicable86 median, 50 to 150
  • Observational250 median, 143 to 868
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 the Selective Reminding Task, by phase
PhaseStudies with a sizeMedianMiddle half
Phase 2126347 to 139
Not applicable298650 to 150
Observational11250143 to 868

When dementia and Alzheimer's trials measure it

Half of the primary outcomes that name the Selective Reminding Task are measured within 10 months of the start, and the middle half from 12 weeks to 2 years. 32 primary outcomes give a duration.

Latest time point of each outcome

  • Within a day4 outcomes, 4 as a primary outcome
  • Up to 4 weeks6 outcomes, 1 as a primary outcome
  • 1 to 3 months11 outcomes, 4 as a primary outcome
  • 3 to 6 months14 outcomes, 5 as a primary outcome
  • 6 to 12 months16 outcomes, 8 as a primary outcome
  • 1 to 2 years11 outcomes, 4 as a primary outcome
  • Over 2 years12 outcomes, 6 as a primary outcome
  • No duration given2 outcomes, 2 as a primary outcome

A test as a primary outcomeOnly in secondary or other outcomes

74 of the 76 outcome measures give a duration. A single visit counts as within a day.

Status, results, interventions and countries

Status

  • Recruiting16 studies, 6 as a primary outcome
  • Not yet recruiting3 studies, 1 as a primary outcome
  • Active, not recruiting1 studies, 0 as a primary outcome
  • Completed41 studies, 20 as a primary outcome
  • Stopped early6 studies, 3 as a primary outcome
  • Status unknown9 studies, 4 as a primary outcome

What they test

  • Behavioral14 studies, 7 as a primary outcome
  • Drug33 studies, 11 as a primary outcome
  • Device11 studies, 4 as a primary outcome
  • Dietary supplement8 studies, 4 as a primary outcome
  • Procedure5 studies, 3 as a primary outcome
  • Diagnostic test3 studies, 1 as a primary outcome
  • Biological2 studies, 1 as a primary outcome
  • Radiation2 studies, 1 as a primary outcome
  • Genetic1 studies, 0 as a primary outcome
  • Other11 studies, 4 as a primary outcome
  • None given5 studies, 5 as a primary outcome

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

Where their sites are

  • United States37 studies, 14 as a primary outcome
  • France16 studies, 5 as a primary outcome
  • Italy14 studies, 5 as a primary outcome
  • Spain8 studies, 5 as a primary outcome
  • United Kingdom8 studies, 4 as a primary outcome
  • Canada7 studies, 2 as a primary outcome
  • Argentina5 studies, 1 as a primary outcome
  • Australia5 studies, 2 as a primary outcome
  • Germany5 studies, 1 as a primary outcome
  • Chile4 studies, 0 as a primary outcome
  • Mexico4 studies, 1 as a primary outcome
  • Sweden4 studies, 2 as a primary outcome

39 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 dementia and Alzheimer's disease studies that name the Selective Reminding Task: 27 of 41, 66%

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

Completed dementia and Alzheimer's disease studies that name the Selective Reminding Task and every completed study, by how they reported results
ResultsCompleted dementia and Alzheimer's disease studies that name the Selective Reminding TaskEvery completed study
Results on ClinicalTrials.gov and a paper10, 24%776, 10%
Results on ClinicalTrials.gov only8, 20%1,139, 14%
A results paper only9, 22%1,711, 22%
Neither14, 34%4,327, 54%

The 76 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
TestThe Selective Reminding Task

76 studies match. 34 name the Selective Reminding Task in a primary outcome. Median size 84 participants. Median time to the primary outcome: 10 months.

Loading 76 studies; the filters turn on when they arrive.

By start year
024682000: 0 studies, 0 naming the Selective Reminding Task in a primary outcome20002001: 1 studies, 1 naming the Selective Reminding Task in a primary outcome2002: 0 studies, 0 naming the Selective Reminding Task in a primary outcome2003: 0 studies, 0 naming the Selective Reminding Task in a primary outcome2004: 0 studies, 0 naming the Selective Reminding Task in a primary outcome2005: 0 studies, 0 naming the Selective Reminding Task in a primary outcome20052006: 1 studies, 1 naming the Selective Reminding Task in a primary outcome2007: 0 studies, 0 naming the Selective Reminding Task in a primary outcome2008: 3 studies, 2 naming the Selective Reminding Task in a primary outcome2009: 0 studies, 0 naming the Selective Reminding Task in a primary outcome2010: 5 studies, 2 naming the Selective Reminding Task in a primary outcome20102011: 1 studies, 1 naming the Selective Reminding Task in a primary outcome2012: 4 studies, 2 naming the Selective Reminding Task in a primary outcome2013: 6 studies, 3 naming the Selective Reminding Task in a primary outcome2014: 3 studies, 1 naming the Selective Reminding Task in a primary outcome2015: 3 studies, 2 naming the Selective Reminding Task in a primary outcome20152016: 1 studies, 0 naming the Selective Reminding Task in a primary outcome2017: 3 studies, 1 naming the Selective Reminding Task in a primary outcome2018: 3 studies, 2 naming the Selective Reminding Task in a primary outcome2019: 7 studies, 3 naming the Selective Reminding Task in a primary outcome2020: 1 studies, 0 naming the Selective Reminding Task in a primary outcome20202021: 8 studies, 2 naming the Selective Reminding Task in a primary outcome2022: 7 studies, 3 naming the Selective Reminding Task in a primary outcome2023: 5 studies, 2 naming the Selective Reminding Task in a primary outcome2024: 7 studies, 3 naming the Selective Reminding Task in a primary outcome2025: 4 studies, 2 naming the Selective Reminding Task in a primary outcome20252026: 3 studies, 1 naming the Selective Reminding Task in a primary outcome

2026 is partly planned starts.

Show as a table
Matching studies by start year
Start yearStudiesAs a primary outcome
200000
200111
200200
200300
200400
200500
200611
200700
200832
200900
201052
201111
201242
201363
201431
201532
201610
201731
201832
201973
202010
202182
202273
202352
202473
202542
202631

Library tests named most

  • Selective Reminding Task76 studies, 34 as a primary outcome
  • Trail Making Test28 studies, 8 as a primary outcome
  • Symbol Coding24 studies, 10 as a primary outcome
  • Category Fluency23 studies, 4 as a primary outcome
  • Short Story Recall21 studies, 10 as a primary outcome
  • Verbal Fluency20 studies, 6 as a primary outcome
  • Digit Span Test15 studies, 3 as a primary outcome
  • Stroop Color-Word Test14 studies, 8 as a primary outcome
  • Picture Naming Test12 studies, 3 as a primary outcome
  • Clock Drawing Task8 studies, 2 as a primary outcome

Largest condition groups

  • Dementia and Alzheimer's76 studies, 34 as a primary outcome
  • Mild cognitive impairment26 studies, 10 as a primary outcome
  • Depression and bipolar disorder3 studies, 1 as a primary outcome
  • Aging, frailty and exercise3 studies, 1 as a primary outcome
  • Obesity and diabetes3 studies, 2 as a primary outcome
  • Parkinson's disease2 studies, 1 as a primary outcome
  • Cancer2 studies, 0 as a primary outcome
  • Sleep and sleep disorders2 studies, 0 as a primary outcome
  • Multiple sclerosis1 study, 0 as a primary outcome
  • Healthy volunteers1 study, 1 as a primary outcome
  • Anxiety, PTSD and OCD1 study, 0 as a primary outcome
  • Hearing loss1 study, 1 as a primary outcome

Phases

Participants

Lead sponsor: industry 13, NIH 1, other 62. Interventional 65, observational 11.

As a primary outcomeSecondary or other outcomeThe Selective Reminding Task

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
NCT07856043Start2026PhasePhase 1ConditionsDementia and Alzheimer's, Mild cognitive impairment, Cardiovascular diseaseParticipants18Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Trail Making TestSecondary12 weeks
  • Symbol CodingSecondary12 weeks
  • Selective Reminding TaskSecondary12 weeks
NCT07730671Start2026PhaseObservationalConditionsDementia and Alzheimer'sParticipants121Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Stroop Color-Word TestPrimary5 years
  • Short Story RecallPrimary5 years
  • Selective Reminding TaskPrimary5 years
NCT07717411Start2026PhasePhase 3ConditionsDementia and Alzheimer'sParticipants1,600Lead sponsorIndustryStatusRecruitingLibrary tests named
  • Trail Making TestSecondary4 years
  • Symbol CodingSecondary4 years
  • Category FluencySecondary4 years
  • Short Story RecallSecondary4 years
  • Selective Reminding TaskSecondary4 years
NCT07664865Start2024PhaseObservationalConditionsDementia and Alzheimer'sParticipants250Lead sponsorOtherStatusCompletedLibrary tests named
  • Stroop Color-Word TestPrimarysame day
  • Verbal FluencyPrimarysame day
  • Symbol CodingPrimarysame day
  • Picture Naming TestPrimarysame day
  • Clock Drawing TaskPrimarysame day
  • Complex Figure Copy and RecallPrimarysame day
  • Emoji Emotion RecognitionPrimarysame day
  • Selective Reminding TaskPrimarysame day
NCT07399418Start2025PhaseObservationalConditionsDementia and Alzheimer'sParticipants80Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestPrimarysame day
  • Stroop Color-Word TestPrimarysame day
  • Verbal FluencyPrimarysame day
  • Digit Span TestPrimarysame day
  • Go/No-Go TaskPrimarysame day
  • Category FluencyPrimarysame day
  • Clock Drawing TaskPrimarysame day
  • Complex Figure Copy and RecallPrimarysame day
  • Matrix ReasoningPrimarysame day
  • Selective Reminding TaskPrimarysame day
NCT07233512Start2023PhaseNot applicableConditionsDementia and Alzheimer'sParticipants26Lead sponsorOtherStatusRecruitingLibrary tests named
  • Symbol CodingPrimary2 years
  • Short Story RecallPrimary2 years
  • Selective Reminding TaskPrimary2 years
NCT07064226Start2025PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants102Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestSecondary6 months
  • Verbal FluencySecondary6 months
  • Category FluencySecondary6 months
  • Selective Reminding TaskSecondary6 months
NCT06953167Start2025PhaseObservationalConditionsDementia and Alzheimer'sParticipants600Lead sponsorOtherStatusRecruitingLibrary tests named
  • Symbol CodingPrimary8.5 years
  • Category FluencyPrimary8.5 years
  • Short Story RecallPrimary8.5 years
  • Selective Reminding TaskPrimary8.5 years
NCT06668610Start2024PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants50Lead sponsorOtherStatusRecruitingLibrary tests named
  • Stroop Color-Word TestPrimary8 weeks
  • Selective Reminding TaskPrimary8 weeks
NCT06662526Start2024PhasePhase 4ConditionsDementia and Alzheimer's, Mild cognitive impairment, Depression and bipolar disorderParticipants250Lead sponsorOtherStatusNot yet recruitingLibrary tests named
  • Selective Reminding TaskSecondary5 years
NCT06647498Start2024PhasePhase 2/3ConditionsDementia and Alzheimer'sParticipants280Lead sponsorOtherStatusRecruitingLibrary tests named
  • Symbol CodingSecondary3.5 years
  • Category FluencySecondary3.5 years
  • Selective Reminding TaskSecondary3.5 years
NCT06492967Start2021PhaseNot applicableConditionsDementia and Alzheimer'sParticipants1,065Lead sponsorOtherStatusCompleted

Paper

Library tests named
  • Stroop Color-Word TestSecondary2 years
  • Digit Span TestSecondary2 years
  • Symbol CodingSecondary2 years
  • Short Story RecallSecondary2 years
  • Selective Reminding TaskSecondary2 years
NCT06416072Start2023PhaseObservationalConditionsDementia and Alzheimer'sParticipants3,000Lead sponsorOtherStatusRecruitingLibrary tests named
  • Symbol CodingSecondary6 years
  • Category FluencySecondary6 years
  • Selective Reminding TaskSecondary6 years
NCT06174038Start2024PhaseNot applicableConditionsDementia and Alzheimer's, Hearing lossParticipants150Lead sponsorOtherStatusRecruitingLibrary tests named
  • Trail Making TestPrimary12 months
  • Symbol CodingPrimary12 months
  • Selective Reminding TaskPrimary12 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
NCT06094452Start2020PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants84Lead sponsorOtherStatusCompletedLibrary tests named
  • Trail Making TestSecondary6 months
  • Verbal LearningSecondary6 months
  • Picture Naming TestSecondary6 months
  • Clock Drawing TaskSecondary6 months
  • Selective Reminding TaskSecondary6 months
NCT06080659Start2023PhaseNot applicableConditionsDementia and Alzheimer's, Parkinson's diseaseParticipants120Lead sponsorOtherStatusRecruitingLibrary tests named
  • Digit Span TestSecondary6 months
  • Category FluencySecondary6 months
  • Picture Naming TestSecondary6 months
  • Clock Drawing TaskSecondary6 months
  • Letter-Number Sequencing TaskSecondary6 months
  • Selective Reminding TaskSecondary6 months
  • Line Angle MatchingSecondary6 months
  • Recognition Memory TestSecondary6 months
NCT05984446Start2019PhaseNot applicableConditionsDementia and Alzheimer'sParticipants86Lead sponsorOtherStatusCompletedLibrary tests named
  • Selective Reminding TaskOther outcome1 week
  • Face-name Memory TaskSecondary1 week
NCT05943925Start2021PhaseObservationalConditionsDementia and Alzheimer's, Mild cognitive impairment, Parkinson's diseaseParticipants240Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Verbal FluencyPrimary
  • Selective Reminding TaskPrimary
NCT05924425Start2024PhasePhase 4ConditionsDementia and Alzheimer's, Sleep and sleep disordersParticipants62Lead sponsorOtherStatusRecruitingLibrary tests named
  • Verbal FluencySecondary9 weeks
  • Selective Reminding TaskSecondary9 weeks
NCT05806697Start2023PhaseNot applicableConditionsDementia and Alzheimer'sParticipants240Lead sponsorOtherStatusRecruitingLibrary tests named
  • Selective Reminding TaskPrimary5 years
NCT05699330Start2023PhaseNot applicableConditionsDementia and Alzheimer'sParticipants6Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Trail Making TestSecondary2 years
  • Selective Reminding TaskSecondary2 years
NCT05480358Start2019PhasePhase 1/2ConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants40Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Selective Reminding TaskSecondary12 months
NCT05468268Start2022PhaseNot applicableConditionsDementia and Alzheimer's, Mild cognitive impairmentParticipants40Lead sponsorOtherStatusStatus unknownLibrary tests named
  • Trail Making TestSecondary6 months
  • Stroop Color-Word TestSecondary6 months
  • Verbal FluencySecondary6 months
  • Digit Span TestSecondary6 months
  • Category FluencySecondary6 months
  • Complex Figure Copy and RecallSecondary6 months
  • Matrix ReasoningSecondary6 months
  • Cancellation TestSecondary6 months
  • Selective Reminding TaskSecondary6 months
  • Token Commands TaskSecondary6 months
NCT05433493Start2022PhaseNot applicableConditionsDementia and Alzheimer'sParticipants142Lead sponsorOtherStatusCompleted

Paper 1Paper 2

Library tests named
  • Trail Making TestPrimarysame day
  • Selective Reminding TaskPrimarysame day

Page 1 of 4

Questions, answered from the data

How many dementia and Alzheimer's trials use the Selective Reminding Task?

76 registered dementia and Alzheimer's disease studies on ClinicalTrials.gov name it in an outcome measure, 34 of them in a primary outcome: 5% of the condition's 1,673 studies with a cognitive outcome, against 1% of all of them. It is the 10th most named test in dementia and Alzheimer's trials.

Which tests do dementia and Alzheimer's trials use with the Selective Reminding Task?

The Trail Making Test (28 studies), Symbol Coding (24 studies) and Category Fluency (23 studies).

How many participants do phase 2 dementia and Alzheimer's trials that use the Selective Reminding Task enroll?

Half of the phase 2 studies that name it enroll 63 participants or fewer, and the middle half enroll 47 to 139. 12 of them give a size.

When do dementia and Alzheimer's trials measure the Selective Reminding Task?

Half of the primary outcomes that name the Selective Reminding Task are measured within 10 months of the start, and the middle half from 12 weeks to 2 years. 32 primary outcomes give a duration.

How many completed dementia and Alzheimer's trials that use the Selective Reminding Task have reported results?

27 of the 41 completed studies that name it, 66%, have reported results: 18 posted them on ClinicalTrials.gov, 19 have a results paper linked to the registry record, and 10 did both. The other 14 show neither. Of all completed studies with a cognitive outcome, 46% have reported results.

More on the Selective Reminding Task and dementia and Alzheimer's disease

  • Every cognitive test in dementia and Alzheimer's trials: 1,673 studies
  • The Selective Reminding Task in all clinical trials: 183 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
  • Delayed Recall Module71
  • 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.

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