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Subfield · Medicine

Emergency Medicine research

Emergency Medicine is a subfield of Medicine. Science Explorer counts 291k research works in it since 1950. 10.1% of them reached the world's top 10% most cited for their field and year.

In short: medical specialty concerned with care for patients who require immediate medical attention.

Research works
291k
fractional, since 1950
In the world top 10%
29k
per year above
Top-10% rate
10.1%
share of its works in the world top 10%
Topics
11
Growth, 2018-21 → 2022-25
+3%
the tick is no change
Largest producer
United States
45% of the 10 largest, 2022-now
Emergency Medicine

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

What is Emergency Medicine research about, and what is growing?

By the world's output in 2021-25, its most used keywords are Cardiac Arrest, Resuscitation, Meta-Analysis, Injury Severity, Trauma Center, Inflammation. Gaining share since 2011-15: COVID-19, Emergency Medicine, Intramuscular Injections, Vaccine Administration, Management. Losing share: Cardiovascular Disease, HIV Infection, Conducted Electrical Weapons, Excited Delirium Syndrome.

▲ gaining share of this field◆ holding its share▼ losing share

Size is the world's fractional works in 2021-25 in the topics tagged with each word; colour compares the word's share of this field with 2011-15. Each links to the topic it comes from most.

All 25 words, with their numbers
  1. Cardiac Arrest16k◆ 1.03×1 topic
  2. Resuscitation16k◆ 1.03×1 topic
  3. Meta-Analysis13k◆ 1.02×2 topics
  4. Injury Severity11k◆ 1.07×1 topic
  5. Trauma Center11k◆ 1.07×1 topic
  6. Inflammation10k▼ 0.83×2 topics
  7. Management8,581▲ 1.25×2 topics
  8. Emergency Department Crowding8,549◆ 1.01×1 topic
  9. Patient Satisfaction8,549◆ 1.01×1 topic
  10. Appendicitis7,692◆ 1.15×1 topic
  11. Diagnosis7,692◆ 1.15×1 topic
  12. Cardiovascular Disease5,279▼ 0.78×1 topic
  13. HIV Infection5,279▼ 0.78×1 topic
  14. Bone Marrow Biopsy5,129◆ 0.88×1 topic
  15. FDG PET/CT5,129◆ 0.88×1 topic
  16. Poison Control Centers4,427◆ 0.91×1 topic
  17. Toxic Exposure Surveillance4,427◆ 0.91×1 topic
  18. Hospital Handoffs3,488◆ 0.93×1 topic
  19. Patient Safety3,488◆ 0.93×1 topic
  20. Conducted Electrical Weapons2,978▼ 0.80×1 topic
  21. Excited Delirium Syndrome2,978▼ 0.80×1 topic
  22. Intramuscular Injections2,303▲ 1.48×1 topic
  23. Vaccine Administration2,303▲ 1.48×1 topic
  24. COVID-19889▲ 5.3×1 topic
  25. Emergency Medicine889▲ 5.3×1 topic

Which countries lead Emergency Medicine research?

On research quality in 2022-now, the United States, Canada and Germany rank highest in Emergency Medicine. By volume, the United States and the United Kingdom publish the most (17k and 3.6k works in 2022-now).

By research quality, 2022-now

  1. 1 United States #1 all time 1.00× citation excellence · 1.86× journals · 100% breadth 11.1% top 10% · 15k works
  2. 2 Canada #2 all time 1.37× citation excellence · 1.59× journals · 100% breadth 13.8% top 10% · 1.5k works
  3. 3 Germany #5 all time 1.58× citation excellence · 1.12× journals · 100% breadth 10.9% top 10% · 1.7k works
  4. 4 France #3 all time 1.44× citation excellence · 1.54× journals · 100% breadth 11.5% top 10% · 1.2k works
  5. 5 Netherlands #4 all time 1.86× citation excellence · 1.63× journals · 100% breadth 18.9% top 10% · 588 works
  6. 6 Denmark #8 all time 1.82× citation excellence · 1.61× journals · 100% breadth 18.9% top 10% · 483 works
  7. 7 Switzerland #6 all time 1.61× citation excellence · 1.81× journals · 100% breadth 14.4% top 10% · 464 works
  8. 8 United Kingdom #7 all time 0.93× citation excellence · 0.89× journals · 100% breadth 10.1% top 10% · 3.2k works
  9. 9 Australia #9 all time 1.26× citation excellence · 0.98× journals · 100% breadth 13.5% top 10% · 1.6k works
  10. 10 China #14 all time 1.39× citation excellence · 0.54× journals · 100% breadth 16.0% top 10% · 2.9k works

The track on each row is that row's top-10% rate. The ranking itself is the quality score, which compares the rate with what each place's own topics predict, adds its share of papers in the Nature Index journals, and counts output and breadth too.

Of 43 countries ranked in Emergency Medicine. Ranked on the quality score for 2022-now; the bracket is the all-time rank.

All countries ranked in Emergency Medicine

By volume, 2022-now

  1. 1 United States 17k works
  2. 2 United Kingdom 3.6k works
  3. 3 China 3.4k works
  4. 4 India 3.2k works
  5. 5 Germany 2k works
  6. 6 Australia 1.8k works
  7. 7 Canada 1.7k works
  8. 8 Japan 1.7k works
  9. 9 Türkiye 1.6k works
  10. 10 Italy 1.5k 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: 45.1%United Kingdom: 9.5%China: 9.2%India: 8.6%6 others listed: 27.6%45%largest
United States17k · 45.1%United Kingdom3,563 · 9.5%China3,440 · 9.2%India3,238 · 8.6%6 others listed10k · 27.6%

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

Which institutions lead Emergency Medicine research?

Harvard University (United States) ranks first in Emergency Medicine on research quality in 2022-now, followed by Johns Hopkins University and University of California, San Francisco.

By research quality, 2022-now

  1. 1 Harvard University United States · Cambridge · #1 all time 15.9% top 10% · 597 works
  2. 2 Johns Hopkins University United States · Baltimore · #3 all time 15.4% top 10% · 272 works
  3. 3 University of California, San Francisco United States · San Francisco · #4 all time 15.3% top 10% · 171 works
  4. 4 University of Toronto Canada · Toronto · #2 all time 15.6% top 10% · 255 works
  5. 5 Stanford University United States · Stanford · #7 all time 14.2% top 10% · 150 works
  6. 6 University of Pennsylvania United States · Philadelphia · #6 all time 13.9% top 10% · 198 works
  7. 7 University of Copenhagen Denmark · Copenhagen · #18 all time 21.6% top 10% · 130 works
  8. 8 University of Washington United States · Seattle · #5 all time 11.8% top 10% · 181 works
  9. 9 University of California, Los Angeles United States · Los Angeles · #9 all time 15.0% top 10% · 138 works
  10. 10 Northwestern University United States · Evanston · #17 all time 14.0% top 10% · 126 works

The track on each row is that row's top-10% rate. The ranking itself is the quality score, which compares the rate with what each place's own topics predict, adds its share of papers in the Nature Index journals, and counts output and breadth too.

Of 115 institutions above the floor of 40 fractional works in Emergency Medicine.

Top 100 Emergency Medicine institutions

By volume, 2022-now

  1. 1 Harvard UniversityUnited States 664 works
  2. 2 University of North Carolina at Chapel HillUnited States 318 works
  3. 3 Johns Hopkins UniversityUnited States 307 works
  4. 4 All India Institute of Medical SciencesIndia 305 works
  5. 5 University of TorontoCanada 288 works
  6. 6 Mayo ClinicUnited States 246 works
  7. 7 University of PennsylvaniaUnited States 218 works
  8. 8 University of WashingtonUnited States 202 works
  9. 9 Yale UniversityUnited States 201 works
  10. 10 University of California, San FranciscoUnited States 194 works

Who are the leading researchers in Emergency Medicine?

Counting only their work in Emergency Medicine, Vinay Nadkarni, Jerry P. Nolan and Ernest Eugene Moore have the most papers in the world top 10% for their subfield and year beyond the 10% expected.

  1. 1 Vinay Nadkarni United States · #39,054 worldwide overall 91.1 of 244 papers here in the top 10%
  2. 2 Jerry P. Nolan United Kingdom · #12,472 worldwide overall 81.0 of 202 papers here in the top 10%
  3. 3 Ernest Eugene Moore United States · #26,532 worldwide overall 81.7 of 217 papers here in the top 10%
  4. 4 Robert Allen Berg United States · #27,422 worldwide overall 75.3 of 187 papers here in the top 10%
  5. 5 Gavin D. Perkins United Kingdom · #38,386 worldwide overall 77.0 of 214 papers here in the top 10%
  6. 6 Clifton W. Callaway United States · #23,795 worldwide overall 67.7 of 170 papers here in the top 10%
  7. 7 Laurie J. Morrison Canada · #20,431 worldwide overall 61.4 of 141 papers here in the top 10%
  8. 8 John B. Holcomb United States · #20,024 worldwide overall 58.1 of 147 papers here in the top 10%
  9. 9 Jasmeet Soar United Kingdom · #17,174 worldwide overall 52.2 of 126 papers here in the top 10%
  10. 10 Avery B. Nathens Canada · #49,120 worldwide overall 49.4 of 135 papers here in the top 10%

Ranked on their work in Emergency Medicine alone: how many more of their papers here reached the world top 10% for their subfield and year than the 10% expected, among 1,030,070 ranked researchers with a paper here. Each paper counts once, so many strong papers outrank one famous one, and a long record of ordinary papers does not climb. Identities come from OpenAlex author disambiguation, which occasionally merges or splits people.

Top 100 Emergency Medicine researchers

What are the most cited papers in Emergency Medicine?

The most cited paper in Emergency Medicine is "A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation" (Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al., 1987), with 50,676 citations. Next come "APACHE II" (13,863) and "Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline" (10,622).

Most cited papers
#PaperReleasedCitations
1 A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases 1987 50,676
2 APACHE II William A. Knaus, Elizabeth A. Draper, Douglas P. Wagner et al. · Critical Care Medicine Oct 1985 13,863
3 Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline Michael F. Holick, Neil Binkley, Heike Annette Bischoff-Ferrari et al. · The Journal of Clinical Endocrinology & Metabolism Open access 7 Jun 2011 10,622
4 The 2016 revision to the World Health Organization classification of myeloid neoplasms and acute leukemia Daniel A. Arber, Attilio Orazi, Robert Paul Hasserjian et al. · Blood Open access 12 Apr 2016 10,371
5 The injury severity score: a method for describing patients with multiple injuries and evaluating emergency care. Susan P. Baker, Brian O’Neill, William F. Haddon et al. · PubMed Mar 1974 8,021
All 100 most cited papers, with filters and sorting

Where is Emergency Medicine research done?

The largest centres of Emergency Medicine research in 2022-now are London (United Kingdom), Boston (United States), New York (United States) and Melbourne (Australia). Among places with at least 20 works in it, it is an unusually large share of all research in Wakefield and Inverness.

Largest cities, 2022-now

  1. 1 LondonUnited Kingdom 939 works
  2. 2 BostonUnited States 698 works
  3. 3 New YorkUnited States 697 works
  4. 4 MelbourneAustralia 515 works
  5. 5 PhiladelphiaUnited States 515 works
  6. 6 BaltimoreUnited States 511 works
  7. 7 BeijingChina 487 works
  8. 8 ParisFrance 480 works
  9. 9 SeoulSouth Korea 472 works
  10. 10 IstanbulTürkiye 427 works

Where it is the local speciality

  1. WakefieldGB · 28.6 works22×
  2. InvernessGB · 26.8 works19×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Emergency Medicine than the world average.

See Emergency Medicine on the map

Emergency Medicine research by country

The best places for Emergency Medicine research inside each country, with that country's researchers and world standing.

Where is the best place to study Emergency Medicine?

Among universities, judged by research, Harvard University, University of Toronto and Johns Hopkins University score highest, combining standing in the field's ranking, 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 15.37%fractional works in this field (log) →share of work in the world top 10% →Harvard UniversityUniversity of TorontoUniversity of Califo…Johns Hopkins Univer…
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.

Standingthis field's institution ranking, three quarters all time and a quarter 2022-now
50%
Citation excellenceshare of its work in the world top 10%, 2022-now and all time averaged
20%
Specialisationhow much of its work is in this field, counted up to 10× the world share
5%
Sizeits output in this field, on a log scale
15%
Growthoutput growth, counted from -20% to +20%
5%
Internationalshare of its work with a co-author abroad
5%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreRank in field (all time)Top 10%SpecialisationWorksGrowth
1Harvard UniversityUnited States 86.7#1 (#1)15.6%4.0×664 -8.8%
2University of TorontoCanada 73.1#4 (#2)15.3%2.8×288 -16.3%
3Johns Hopkins UniversityUnited States 72.6#2 (#3)15.0%3.9×308 -15.7%
4University of California, San FranciscoUnited States 69.1#3 (#4)15.3%5.3×194 -9.2%
5University of WashingtonUnited States 63.8#8 (#5)11.9%3.5×202 -5.3%
6University of PennsylvaniaUnited States 62.5#6 (#6)13.7%4.0×218 -11.8%
7University of CopenhagenDenmark 62.0#7 (#18)21.1%3.0×145 +17.1%
8Stanford UniversityUnited States 59.8#5 (#7)14.3%2.2×169 -18.0%
9University of California, Los AngelesUnited States 58.9#9 (#9)14.3%2.6×156 +3.3%
10University of PittsburghUnited States 55.1#14 (#15)17.2%3.4×140 -0.5%

Universities only. The score blends standing (50%), citation excellence (20%), size (15%), specialisation (5%), growth (5%), international reach (5%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise. Standing is the score in this field's institution ranking, three quarters over all time and a quarter 2022-now; excellence averages the two windows too. Four years alone undercount fields such as AI, where many conference and arXiv papers from 2022 on carry no affiliation in the data.

Every institution in Emergency Medicine, country by country

Is Emergency Medicine research growing?

Output in 2022-2025 was 3% higher than in 2018-2021, peaking in 2021. The fastest-growing topics are Emergency Medicine Education and Research, Intramuscular injections and effects and Appendicitis Diagnosis and Management.

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 Emergency Medicine as a percentage of every work published that year, 0.24% in 2024.

still counting0.20%0.40%Emergency Medicine0.24% in 202519801990200020102020

Fractional works of Emergency Medicine 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%Emergency Medicine10.2% 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.

  1. Emergency Medicine Education and Research+124%
  2. Intramuscular injections and effects+22%
  3. Appendicitis Diagnosis and Management+8%
  4. Restraint-Related Deaths+4%
  5. Hospital Admissions and Outcomes+2%
  6. Cardiac Arrest and Resuscitation+2%
  7. Hematological disorders and diagnostics-2%
  8. Emergency and Acute Care Studies-4%
← shrinkingno changegrowing →

Growth in output from 2018-21 to 2022-25. Every topic is a page of its own.

What does Emergency Medicine include?

Cardiac Arrest and Resus…65kCardiac Arrest and Resuscitation: 65k fractional worksTrauma and Emergency Care Studies: 44k fractional worksEmergency and Acute Care…33kEmergency and Acute Care Studies: 33k fractional worksAppendicitis Diagnosis a…30kAppendicitis Diagnosis and Management: 30k fractional worksHematological disorders and diagnostics: 28k fractional worksPoisoning and overdose treatments: 25k fractional worksHIV-related health compl…24kHIV-related health complications and treatments: 24k fractional worksRestraint-Related Deaths: 17k fractional worksHospital Admissions and Outcomes: 13k fractional worksIntramuscular injections and effects: 8,339 fractional worksEmergency Medicine Education and Research: 2,258 fractional works

Area is fractional works in that topic. Every name below is a page of its own.

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Who leads Emergency Medicine, on Science Explorer

A card with the countries and institutions that lead Emergency Medicine, for a post or a slide.

Download the card

1200 × 630 PNG, sized for social posts, drawn from the latest snapshot.

The leading institutions' badges6Each links to that institution's page and updates with every snapshot

Discussion

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