Emergency and Acute Care Studies

Emergency and Acute Care Studies is a research topic within Emergency Medicine. Science Explorer counts 33k research works in it since 1951. 10.2% of them reached the world's top 10% most cited for their field and year.

This cluster of papers explores the causes, effects, and potential solutions related to emergency department crowding, with a focus on patient satisfaction, health care utilization patterns, triage systems, geriatric care, hospital overcrowding, ambulance diversion, primary care access, and implications for health policy.

Emergency Department Crowding
Patient Satisfaction
Health Care Utilization
Triage Systems
Geriatric Care
Hospital Overcrowding
Ambulance Diversion
Primary Care Access
Health Policy
Clinical Outcomes

Research works: 33k
In the world top 10%: 3.4k
Top-10% rate: 10.2%
Growth, 2018-21 → 2022-25: -4%
Largest producer: United States

Emergency and Acute Care Studies

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

Which countries lead Emergency and Acute Care Studies research?

By volume, the United States and the United Kingdom publish the most (2.3k and 743 works in 2022-now).

By volume, 2022-now

1 United States 2.3k works
2 United Kingdom 743 works
3 Australia 409 works
4 Canada 358 works
5 Germany 230 works
6 China 182 works
7 Türkiye 180 works
8 India 180 works
9 France 177 works
10 Spain 167 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 States2,267 · 46.3%United Kingdom743 · 15.2%Australia409 · 8.4%Canada358 · 7.3%6 others listed1,116 · 22.8%

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

Which institutions lead Emergency and Acute Care Studies research?

By volume in 2022-now, Harvard University publishes the most Emergency and Acute Care Studies research, followed by University of Toronto and Monash University.

By volume, 2022-now

1 Harvard UniversityUnited States 109 works
2 University of TorontoCanada 51 works
3 Monash UniversityAustralia 40 works
4 Johns Hopkins UniversityUnited States 40 works
5 Yale UniversityUnited States 40 works
6 University of PennsylvaniaUnited States 39 works
7 Mayo ClinicUnited States 37 works
8 United States Department of Veterans AffairsUnited States 35 works
9 University of California, San FranciscoUnited States 34 works
10 University of North Carolina at Chapel HillUnited States 33 works

Who are the leading researchers in Emergency and Acute Care Studies?

The most-cited researchers publishing on Emergency and Acute Care Studies include Zulfiqar Ahmed Bhutta, Ronald C. Kessler and John J.V. McMurray.

1 Zulfiqar Ahmed Bhutta Pakistan 371k citations
2 Ronald C. Kessler United States 360k citations
3 John J.V. McMurray United Kingdom 349k citations
4 Cyrus Cooper United Kingdom 342k citations
5 Gordon Henry Guyatt Canada 315k citations
6 Dan J. Stein South Africa 306k citations
7 Naohiro Yonemoto Japan 297k citations
8 Jeremy Grimshaw Canada 281k citations
9 Ted R. Miller United States 279k citations
10 Yousef Saleh Khader Jordan 274k 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 Emergency and Acute Care Studies?

The most cited paper in Emergency and Acute Care Studies 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 "The injury severity score: a method for describing patients with multiple injuries and evaluating emergency care." (8,021).

Most cited papers
#	Paper	Released	Citations
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	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
4	Infectious Diseases Society of America/American Thoracic Society Consensus Guidelines on the Management of Community-Acquired Pneumonia in Adults Lionel A. Mandell, Richard G. Wunderink, Antonio Anzueto et al. · Clinical Infectious Diseases Open access	3 Feb 2007	6,286
5	Updating and Validating the Charlson Comorbidity Index and Score for Risk Adjustment in Hospital Discharge Abstracts Using Data From 6 Countries Hude Quan, Bing Li, Chantal Marie Couris et al. · American Journal of Epidemiology	17 Feb 2011	6,044

All 99 most cited papers, with filters and sorting

Where is Emergency and Acute Care Studies research done?

The largest centres of Emergency and Acute Care Studies research in 2022-now are London (United Kingdom), Melbourne (Australia), Boston (United States) and New York (United States).

Largest cities, 2022-now

1 LondonUnited Kingdom 173 works
2 MelbourneAustralia 121 works
3 BostonUnited States 113 works
4 New YorkUnited States 103 works
5 BaltimoreUnited States 73 works
6 PhiladelphiaUnited States 73 works
7 TorontoCanada 70 works
8 RiyadhSaudi Arabia 68 works
9 SeoulSouth Korea 64 works
10 ParisFrance 61 works

See Emergency and Acute Care Studies on the map

Where is the best place to study Emergency and Acute Care Studies?

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

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.

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.

#	University	Score	Top 10%	Specialisation	Works	Growth
1	Harvard UniversityUnited States	69.2	16.5%	5.5×	109	-18.7%
2	University of California, San FranciscoUnited States	61.3	15.4%	7.7×	34	+10.6%
3	Yonsei UniversitySouth Korea	60.8	32.0%	2.0×	11	+24.8%
4	Yale UniversityUnited States	60.0	14.5%	5.9×	40	+20.9%
5	University of PennsylvaniaUnited States	57.3	15.2%	5.9×	39	+9.4%
6	University of OxfordUnited Kingdom	56.3	21.7%	1.7×	15	+2.0%
7	University of TorontoCanada	53.7	12.3%	4.0×	51	-22.0%
8	University of SheffieldUnited Kingdom	53.6	17.8%	6.4×	21	-11.8%
9	Monash UniversityAustralia	53.3	12.9%	6.6×	40	-14.0%
10	University of Naples Federico IIItaly	52.5	26.0%	1.8×	8	+126.7%
11	Stanford UniversityUnited States	52.2	16.7%	3.5×	32	-2.6%
12	University College LondonUnited Kingdom	51.6	10.1%	3.2×	32	+38.4%
13	University of BaselSwitzerland	51.3	23.8%	3.9×	9	-36.5%
14	University of Southern DenmarkDenmark	51.1	15.0%	6.5×	16	+9.0%
15	Johns Hopkins UniversityUnited States	49.7	11.9%	4.2×	40	-18.2%
16	Aarhus UniversityDenmark	48.9	22.6%	2.3×	12	-5.5%
17	King Saud UniversitySaudi Arabia	47.3	12.2%	2.4×	14	+115.4%
18	Northwestern UniversityUnited States	47.2	20.1%	4.7×	24	-25.8%
19	University of WashingtonUnited States	46.6	11.6%	3.4×	24	-8.3%
20	Tel Aviv UniversityIsrael	45.7	18.6%	2.7×	13	+54.9%
21	Emory UniversityUnited States	44.5	8.5%	5.6×	28	+9.4%
22	University of RochesterUnited States	44.1	13.8%	3.8×	11	+19.1%
23	McGill UniversityCanada	44.0	17.9%	2.4×	15	-10.2%
24	University of CalgaryCanada	43.1	12.6%	4.6×	19	-21.9%
25	University of Massachusetts Chan Medical SchoolUnited States	42.6	15.2%	8.9×	9	+14.9%
26	University of CopenhagenDenmark	42.5	17.6%	2.3×	13	-9.1%
27	Karolinska InstitutetSweden	42.0	14.0%	3.6×	13	-35.5%
28	Indiana UniversityUnited States	41.9	11.2%	4.2×	25	-5.1%
29	Boston UniversityUnited States	41.9	13.6%	3.2×	9	+15.3%
30	University of MichiganUnited States	41.4	15.0%	2.6×	25	-28.6%
31	McMaster UniversityCanada	41.0	10.9%	5.2×	19	-8.6%
32	Duke UniversityUnited States	40.5	10.0%	3.8×	19	+8.3%
33	Medical College of WisconsinUnited States	40.5	8.2%	8.4×	15	+18.8%
34	University of BirminghamUnited Kingdom	40.5	10.8%	3.5×	13	+48.7%
35	University of TasmaniaAustralia	40.2	10.4%	6.9×	10	+26.8%
36	University of California, Los AngelesUnited States	40.1	13.4%	3.0×	22	-11.9%
37	Griffith UniversityAustralia	40.1	8.8%	6.7×	18	+3.8%
38	George Washington UniversityUnited States	40.0	8.8%	7.0×	18	+8.8%
39	La Trobe UniversityAustralia	39.9	13.9%	5.4×	10	+3.3%
40	The University of MelbourneAustralia	39.8	13.2%	3.1×	22	-26.6%
41	National University of SingaporeSingapore	39.6	11.8%	1.8×	14	+5.9%
42	Universitat de BarcelonaSpain	39.1	9.4%	3.3×	16	+20.4%
43	University of the WitwatersrandSouth Africa	38.4	11.5%	3.5×	9	+76.6%
44	University of LimerickIreland	38.2	6.9%	12.4×	15	+81.2%
45	University of LiverpoolUnited Kingdom	37.9	6.6%	4.5×	16	+11.7%
46	Oregon Health & Science UniversityUnited States	37.7	11.8%	7.0×	14	+3.3%
47	Radboud University NijmegenNetherlands	35.9	10.4%	3.0×	11	-42.5%
48	Aga Khan UniversityPakistan	35.3	10.3%	8.8×	10	+18.1%
49	University of Maryland, BaltimoreUnited States	32.8	8.5%	8.7×	19	-18.5%
50	University of North Carolina at Chapel HillUnited States	32.5	6.3%	3.0×	33	-45.6%
51	University of Colorado DenverUnited States	32.4	11.1%	8.2×	17	-44.7%
52	Imperial College LondonUnited Kingdom	31.6	7.6%	2.1×	13	-12.4%

Universities only. The score blends 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 Emergency and Acute Care Studies, country by country

Is Emergency and Acute Care Studies research growing?

Output in 2022-2025 was 4% lower than in 2018-2021, peaking in 2021.

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 and Acute Care Studies as a percentage of every work published that year, 0.030% in 2024.

Fractional works of Emergency and Acute Care Studies 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.

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.

Discussion

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Which countries lead Emergency and Acute Care Studies research?

By volume, 2022-now

How concentrated that is

Which institutions lead Emergency and Acute Care Studies research?

By volume, 2022-now

Who are the leading researchers in Emergency and Acute Care Studies?

What are the most cited papers in Emergency and Acute Care Studies?

Where is Emergency and Acute Care Studies research done?

Largest cities, 2022-now

Where is the best place to study Emergency and Acute Care Studies?

Is Emergency and Acute Care Studies research growing?

Its share of all research

How much of it reaches the world top 10%

Which topics inside it are moving

Related research

Discussion