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Topic · Psychiatry and Mental health

Dementia and Cognitive Impairment Research

Dementia and Cognitive Impairment Research is a research topic within Psychiatry and Mental health. Science Explorer counts 68k research works in it since 1950. 9.8% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the diagnosis, management, and impact of Alzheimer's disease, including its relationship with mild cognitive impairment, dementia, neuroimaging techniques, cognitive decline, biomarkers, aging, and the burden experienced by caregivers. It also explores the role of vascular risk factors and the potential benefits of cognitive training.

  • Alzheimer's Disease
  • Mild Cognitive Impairment
  • Dementia
  • Neuroimaging
  • Cognitive Decline
  • Biomarkers
  • Aging
  • Caregiver Burden
  • Vascular Risk Factors
  • Cognitive Training
Research works
68k
fractional, since 1950
In the world top 10%
6.7k
per year above
Top-10% rate
9.8%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+34%
the tick is no change
Largest producer
United States
44% of the 10 largest, 2022-now
Dementia and Cognitive Impairment Research

This ranks research output and citation impact. It says nothing about the quality of diagnosis, treatment or care.

Which countries lead Dementia and Cognitive Impairment Research research?

By volume, the United States and China publish the most (6.8k and 2.6k works in 2022-now).

By volume, 2022-now

  1. 1 United States 6.8k works
  2. 2 China 2.6k works
  3. 3 United Kingdom 1.4k works
  4. 4 Canada 887 works
  5. 5 Australia 687 works
  6. 6 Japan 679 works
  7. 7 India 646 works
  8. 8 South Korea 624 works
  9. 9 Germany 601 works
  10. 10 Italy 531 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

United States: 43.9%China: 16.8%United Kingdom: 9.2%Canada: 5.7%6 others listed: 24.4%44%largest
United States6,780 · 43.9%China2,592 · 16.8%United Kingdom1,414 · 9.2%Canada887 · 5.7%6 others listed3,766 · 24.4%

Shares of the rows listed above, not of the whole node.

Which institutions lead Dementia and Cognitive Impairment Research research?

By volume in 2022-now, Harvard University publishes the most Dementia and Cognitive Impairment Research research, followed by University College London and Mayo Clinic.

By volume, 2022-now

  1. 1 Harvard UniversityUnited States 321 works
  2. 2 University College LondonUnited Kingdom 184 works
  3. 3 Mayo ClinicUnited States 150 works
  4. 4 University of TorontoCanada 147 works
  5. 5 University of California, San FranciscoUnited States 141 works
  6. 6 Johns Hopkins UniversityUnited States 140 works
  7. 7 United States Department of Veterans AffairsUnited States 128 works
  8. 8 University of Southern CaliforniaUnited States 120 works
  9. 9 McGill UniversityCanada 120 works
  10. 10 University of PennsylvaniaUnited States 117 works

Who are the leading researchers in Dementia and Cognitive Impairment Research?

The most-cited researchers publishing on Dementia and Cognitive Impairment Research include Christopher J L Murray, Simon Iain Hay and Theo Vos.

  1. 1 Christopher J L Murray United States 583k citations
  2. 2 Simon Iain Hay United States 452k citations
  3. 3 Theo Vos United States 439k citations
  4. 4 George Davey Smith United Kingdom 435k citations
  5. 5 Ali H. Mokdad United States 429k citations
  6. 6 Walter Churchill Willett United States 411k citations
  7. 7 Mark J. Daly United States 403k citations
  8. 8 Jost Bruno Jonas Germany 350k citations
  9. 9 John J.V. McMurray United Kingdom 349k citations
  10. 10 Hermann Brenner Germany 343k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Dementia and Cognitive Impairment Research?

The most cited paper in Dementia and Cognitive Impairment Research is "The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research" (Daniel J. Buysse, Charles F. Reynolds, T. H. Monk et al., 1989), with 35,692 citations. Next come "The Montreal Cognitive Assessment, MoCA: A Brief Screening Tool For Mild Cognitive Impairment" (26,231) and "[Japanese version of the Neuropsychiatric Inventory--a scoring system for neuropsychiatric disturbance in dementia patients]." (20,864).

Most cited papers
#PaperReleasedCitations
1 The Pittsburgh sleep quality index: A new instrument for psychiatric practice and research Daniel J. Buysse, Charles F. Reynolds, T. H. Monk et al. · Psychiatry Research May 1989 35,692
2 The Montreal Cognitive Assessment, MoCA: A Brief Screening Tool For Mild Cognitive Impairment Ziad Samir Nasreddine, Natalie A. Phillips, Valérie Bédirian et al. · Journal of the American Geriatrics Society 30 Mar 2005 26,231
3 [Japanese version of the Neuropsychiatric Inventory--a scoring system for neuropsychiatric disturbance in dementia patients]. Nobutsugu Hirono, Etsuro Mori, Yoshitaka Ikejiri et al. · PubMed Mar 1997 20,864
4 Special Care Units and Traditional Care in Dementia: Relationship with Behavior, Cognition, Functional Status and Quality of Life - A Review Jeroen S. Kok, Ina J. Berg, Erik Scherder · Dementia and Geriatric Cognitive Disorders Extra Open access 5 Oct 2013 20,652
5 The diagnosis of dementia due to Alzheimer's disease: Recommendations from the National Institute on Aging‐Alzheimer's Association workgroups on diagnostic guidelines for Alzheimer's disease Guy M. McKhann, David S. Knopman, Howard Mark Chertkow et al. · Alzheimer s & Dementia Open access 22 Apr 2011 19,132
All 97 most cited papers, with filters and sorting

Where is Dementia and Cognitive Impairment Research research done?

The largest centres of Dementia and Cognitive Impairment Research research in 2022-now are London (United Kingdom), Beijing (China), Seoul (South Korea) and Boston (United States). Among places with at least 20 works in it, it is an unusually large share of all research in Ōbu and Indianapolis.

Largest cities, 2022-now

  1. 1 LondonUnited Kingdom 543 works
  2. 2 BeijingChina 417 works
  3. 3 SeoulSouth Korea 336 works
  4. 4 BostonUnited States 323 works
  5. 5 New YorkUnited States 318 works
  6. 6 ShanghaiChina 278 works
  7. 7 San FranciscoUnited States 230 works
  8. 8 TokyoJapan 210 works
  9. 9 TorontoCanada 205 works
  10. 10 BaltimoreUnited States 205 works

Where it is the local speciality

  1. ŌbuJP · 30.5 works50×
  2. Indianapolis38.1 works12×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Dementia and Cognitive Impairment Research than the world average.

See Dementia and Cognitive Impairment Research on the map

Where is the best place to study Dementia and Cognitive Impairment Research?

Among universities, judged by research, Harvard University, University College London and University of Gothenburg score highest, combining citation excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%10%20%mean 13.72%fractional works in this field (log) →share of work in the world top 10% →University of Gothen…University College L…Harvard UniversityUniversity of Califo…
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Citation excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Harvard UniversityUnited States 74.711.8%5.7×321 +46.6%
2University College LondonUnited Kingdom 74.315.4%6.5×184 +8.2%
3University of GothenburgSweden 68.318.9%9.7×81 +10.4%
4University of California, San FranciscoUnited States 66.310.6%11.2×142 +56.2%
5Karolinska InstitutetSweden 66.014.0%9.2×92 +9.7%
6University of Southern CaliforniaUnited States 63.611.5%8.1×120 +37.4%
7Johns Hopkins UniversityUnited States 63.412.0%5.1×140 +8.6%
8McGill UniversityCanada 61.810.5%6.8×120 +24.0%
9Sichuan UniversityChina 61.220.3%1.5×59 +275.8%
10Indiana UniversityUnited States 61.012.2%6.7×114 +62.9%

Universities only. The score blends citation excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Dementia and Cognitive Impairment Research, country by country

Is Dementia and Cognitive Impairment Research research growing?

Output in 2022-2025 was 34% higher than in 2018-2021, peaking in 2025. The fastest-growing topics are Dementia and Cognitive Impairment Research.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Dementia and Cognitive Impairment Research as a percentage of every work published that year, 0.073% in 2024.

still counting0.050%0.10%Dementia and Cognitive Impairment Research0.100% in 202519801990200020102020

Fractional works of Dementia and Cognitive Impairment Research over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Dementia and Cognitive Impairment Research9.7% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

Questions people ask

Who is researching a cure for dementia?

By volume in 2022-now, Harvard University publishes the most Dementia and Cognitive Impairment Research research, followed by University College London and Mayo Clinic. By volume, the United States and China publish the most (6.8k and 2.6k works in 2022-now).

How much research is there on dementia, and is it growing?

Output in 2022-2025 was 34% higher than in 2018-2021, peaking in 2025. The fastest-growing topics are Dementia and Cognitive Impairment Research.

Is Dementia and Cognitive Impairment Research research growing?
All 1,273 questions in the Question Catalogue

Discussion

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