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Topic · Surgery

Bariatric Surgery and Outcomes

Bariatric Surgery and Outcomes is a research topic within Surgery. Science Explorer counts 30k research works in it since 1950. 10.0% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the effects of bariatric surgery on obesity, diabetes, and associated health outcomes. It covers topics such as weight loss, cardiovascular risk factors, metabolic surgery, and long-term impact on diabetes control. The research also delves into lifestyle interventions and the relationship between bariatric surgery and mortality rates.

  • Bariatric Surgery
  • Obesity
  • Diabetes
  • Metabolic Surgery
  • Weight Loss
  • Cardiovascular Risk
  • Lifestyle Intervention
  • Type 2 Diabetes
  • Gastric Bypass
  • Health Outcomes
Research works
30k
fractional, since 1950
In the world top 10%
3k
per year above
Top-10% rate
10.0%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+13%
the tick is no change
Largest producer
United States
42% of the 10 largest, 2022-now
Bariatric Surgery and Outcomes

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

Which countries lead Bariatric Surgery and Outcomes research?

By volume, the United States and China publish the most (2.3k and 899 works in 2022-now).

By volume, 2022-now

  1. 1 United States 2.3k works
  2. 2 China 899 works
  3. 3 United Kingdom 500 works
  4. 4 Italy 286 works
  5. 5 Brazil 284 works
  6. 6 Spain 267 works
  7. 7 Germany 261 works
  8. 8 Japan 231 works
  9. 9 India 220 works
  10. 10 Australia 213 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: 41.6%China: 16.6%United Kingdom: 9.2%Italy: 5.3%6 others listed: 27.3%42%largest
United States2,251 · 41.6%China899 · 16.6%United Kingdom500 · 9.2%Italy286 · 5.3%6 others listed1,477 · 27.3%

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

Which institutions lead Bariatric Surgery and Outcomes research?

By volume in 2022-now, Harvard University publishes the most Bariatric Surgery and Outcomes research, followed by Mayo Clinic and Cleveland Clinic.

By volume, 2022-now

  1. 1 Harvard UniversityUnited States 114 works
  2. 2 Mayo ClinicUnited States 96 works
  3. 3 Cleveland ClinicUnited States 43 works
  4. 4 Ain Shams UniversityEgypt 35 works
  5. 5 Tel Aviv UniversityIsrael 35 works
  6. 6 Cornell UniversityUnited States 35 works
  7. 7 Capital Medical UniversityChina 34 works
  8. 8 University of MichiganUnited States 34 works
  9. 9 Johns Hopkins UniversityUnited States 33 works
  10. 10 Yale UniversityUnited States 33 works

Who are the leading researchers in Bariatric Surgery and Outcomes?

The most-cited researchers publishing on Bariatric Surgery and Outcomes include David Moher, George Davey Smith and Ali H. Mokdad.

  1. 1 David Moher Canada 898k citations
  2. 2 George Davey Smith United Kingdom 435k citations
  3. 3 Ali H. Mokdad United States 429k citations
  4. 4 Walter Churchill Willett United States 411k citations
  5. 5 John J.V. McMurray United Kingdom 349k citations
  6. 6 Hermann Brenner Germany 343k citations
  7. 7 Cyrus Cooper United Kingdom 342k citations
  8. 8 Mika Kivimäki United Kingdom 318k citations
  9. 9 John P. A. Ioannidis United States 317k citations
  10. 10 Gordon Henry Guyatt Canada 315k 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 Bariatric Surgery and Outcomes?

The most cited paper in Bariatric Surgery and Outcomes is "Prevalence and Trends in Obesity Among US Adults, 1999-2008" (Katherine M. Flegal, 2010), with 7,642 citations. Next come "Liraglutide and Cardiovascular Outcomes in Type 2 Diabetes" (7,629) and "Semaglutide and Cardiovascular Outcomes in Patients with Type 2 Diabetes" (6,902).

Most cited papers
#PaperReleasedCitations
1 Prevalence and Trends in Obesity Among US Adults, 1999-2008 Katherine M. Flegal · JAMA 13 Jan 2010 7,642
2 Liraglutide and Cardiovascular Outcomes in Type 2 Diabetes Steven P. Marso, Gilbert H. Daniels, Kirstine Brown‐Frandsen et al. · New England Journal of Medicine Open access 13 Jun 2016 7,629
3 Semaglutide and Cardiovascular Outcomes in Patients with Type 2 Diabetes Steven P. Marso, Stephen Charles Bain, Agostino Consoli et al. · New England Journal of Medicine Open access 16 Sep 2016 6,902
4 Bariatric Surgery Hēnry Buchwald, Yoav Avidor, Eugene Braunwald et al. · JAMA 12 Oct 2004 6,822
5 Prevalence and Trends in Obesity Among US Adults, 1999-2000 Katherine M. Flegal · JAMA 9 Oct 2002 6,221
All 98 most cited papers, with filters and sorting

Where is Bariatric Surgery and Outcomes research done?

The largest centres of Bariatric Surgery and Outcomes research in 2022-now are London (United Kingdom), Beijing (China), Boston (United States) and Tehran (Iran). Among places with at least 20 works in it, it is an unusually large share of all research in Scottsdale, Rochester and Jacksonville.

Largest cities, 2022-now

  1. 1 LondonUnited Kingdom 155 works
  2. 2 BeijingChina 127 works
  3. 3 BostonUnited States 103 works
  4. 4 TehranIran 96 works
  5. 5 New YorkUnited States 93 works
  6. 6 SeoulSouth Korea 84 works
  7. 7 ClevelandUnited States 75 works
  8. 8 ShanghaiChina 74 works
  9. 9 ParisFrance 73 works
  10. 10 São PauloBrazil 72 works

Where it is the local speciality

  1. ScottsdaleUS · 39.3 works9.8×
  2. RochesterUS · 28.4 works8.6×
  3. JacksonvilleUS · 30.2 works7.6×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Bariatric Surgery and Outcomes than the world average.

See Bariatric Surgery and Outcomes on the map

Where is the best place to study Bariatric Surgery and Outcomes?

Among universities, judged by research, Harvard University, University of Copenhagen and University College London 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.

0%10%20%30%mean 16.45%fractional works in this field (log) →share of work in the world top 10% →University of Copenh…University College D…Harvard UniversityUniversity College L…
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.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Harvard UniversityUnited States 72.914.8%4.9×114 -1.6%
2University of CopenhagenDenmark 60.921.2%3.2×22 +5.1%
3University College LondonUnited Kingdom 59.313.9%2.5×28 +48.5%
4University College DublinIreland 57.118.2%6.2×23 +1.2%
5Cornell UniversityUnited States 56.615.6%3.7×35 +4.6%
6Karolinska InstitutetSweden 56.213.4%5.3×22 -7.7%
7Yale UniversityUnited States 55.816.2%4.2×33 -3.2%
8Università Cattolica del Sacro CuoreItaly 55.710.9%8.6×27 +94.6%
9Case Western Reserve UniversityUnited States 55.112.9%7.4×32 +14.1%
10Huazhong University of Science and TechnologyChina 54.427.4%0.8×10 +57.4%

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 Bariatric Surgery and Outcomes, country by country

Is Bariatric Surgery and Outcomes research growing?

Output in 2022-2025 was 13% higher than in 2018-2021, peaking in 2025. The fastest-growing topics are Bariatric Surgery and Outcomes.

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 Bariatric Surgery and Outcomes as a percentage of every work published that year, 0.033% in 2024.

still counting0.020%0.040%Bariatric Surgery and Outcomes0.037% in 202519801990200020102020

Fractional works of Bariatric Surgery and Outcomes 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%Bariatric Surgery and Outcomes10.1% 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.

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