Science Explorer Back to mapMap
Discussion
Hospital / health system · Colombo · Sri Lanka

Colombo North Teaching Hospital

In research, Colombo North Teaching Hospital stands highest in Medicine (#6,188 of 8,541 worldwide) and Health Sciences (#7,623 of 9,902 worldwide), 2022-now.

cnth.health.gov.lkROR OpenAlex
World rank, 2022-now
#16,671
of 22,385 · #26,535 all time
Rank in Sri Lanka
#28
of 36
Research works
861
▼ 2% vs 2018-21
Citations
4k
4.7 per fractional work
Top-10% rate
3.6%
all institutions 10.0%
vs its own fields
0.78×
1.00× is exactly expected
Open access
84%
world 40%
International
8%
world 18%
Colombo North Teaching Hospital

What is Colombo North Teaching Hospital known for in research?

The fields where it stands highest, 2022-now, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
MedicineField #6,188 of 8,541 2.5%174 #10808
Health SciencesDomain #7,623 of 9,902 2.6%186 #12926

Each strip is that field's whole ranked pool, with the notch where Colombo North Teaching Hospital sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which fields of science does Colombo North Teaching Hospital work in?

In 2022-now, 80% of research at Colombo North Teaching Hospital is in Health Sciences, 12% in Life Sciences. Its largest fields are Medicine (74%), Biochemistry, Genetics and Molecular Biology (7%), Health Professions (4%). It does 3.3× the world's share of Health Sciences.

Health Sciences: 202 fractional works · 79.6% of its workMedicine: 189 fractional works · 74.4% of its workSurgery: 32 fractional works · 12.7% of its workEpidemiology: 17 fractional works · 6.7% of its workPulmonary and Respiratory Medicine: 15 fractional works · 6.0% of its workPublic Health, Environmental and Occupational Health: 12 fractional works · 4.5% of its workOncology: 10 fractional works · 3.8% of its workObstetrics and Gynecology: 9 fractional works · 3.4% of its workEndocrinology, Diabetes and Metabolism: 8 fractional works · 3.3% of its workInfectious Diseases: 8 fractional works · 3.3% of its workNeurology: 7 fractional works · 2.8% of its workPediatrics, Perinatology and Child Health: 7 fractional works · 2.7% of its workHematology: 6 fractional works · 2.2% of its workPhysiology: 6 fractional works · 2.2% of its workCardiology and Cardiovascular Medicine: 5 fractional works · 2.0% of its workEmergency Medicine: 5 fractional works · 1.9% of its workRheumatology: 5 fractional works · 1.9% of its workGenetics: 5 fractional works · 1.8% of its workRadiology, Nuclear Medicine and Imaging: 4 fractional works · 1.7% of its workPathology and Forensic Medicine: 4 fractional works · 1.6% of its workNephrology: 4 fractional works · 1.4% of its workHepatology: 3 fractional works · 1.2% of its workOphthalmology: 2 fractional works · 0.9% of its workPsychiatry and Mental health: 2 fractional works · 0.8% of its workDermatology: 2 fractional works · 0.8% of its workGeriatrics and Gerontology: 2 fractional works · 0.7% of its workReproductive Medicine: 2 fractional works · 0.6% of its workGastroenterology: 1 fractional works · 0.5% of its workAnatomy: 1 fractional works · 0.4% of its workCritical Care and Intensive Care Medicine: 1 fractional works · 0.4% of its workPharmacology: 1 fractional works · 0.4% of its workFamily Practice: 1 fractional works · 0.3% of its workInternal Medicine: 1 fractional works · 0.3% of its workHealth Informatics: 1 fractional works · 0.2% of its workOrthopedics and Sports Medicine: 1 fractional works · 0.2% of its workSmaller subfields together: 3 fractional works · 1.0% of its workHealth Professions: 10 fractional works · 3.8% of its workGeneral Health Professions: 4 fractional works · 1.5% of its workEmergency Medical Services: 3 fractional works · 1.0% of its workHealth Information Management: 1 fractional works · 0.2% of its workPhysical Therapy, Sports Therapy and Rehabilitation: 1 fractional works · 0.2% of its workSmaller subfields together: 2 fractional works · 0.8% of its workDentistry: 1 fractional works · 0.6% of its workPeriodontics: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.4% of its workVeterinary: 1 fractional works · 0.5% of its workSmall Animals: 1 fractional works · 0.5% of its workNursing: 1 fractional works · 0.4% of its workNutrition and Dietetics: 1 fractional works · 0.4% of its workLife Sciences: 30 fractional works · 11.9% of its workBiochemistry, Genetics and Molecular Biology: 18 fractional works · 6.9% of its workGenetics: 6 fractional works · 2.4% of its workMolecular Biology: 6 fractional works · 2.4% of its workClinical Biochemistry: 2 fractional works · 0.6% of its workCancer Research: 1 fractional works · 0.5% of its workCell Biology: 1 fractional works · 0.4% of its workEndocrinology: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.4% of its workImmunology and Microbiology: 7 fractional works · 2.8% of its workParasitology: 3 fractional works · 1.3% of its workVirology: 2 fractional works · 0.6% of its workMicrobiology: 1 fractional works · 0.5% of its workImmunology: 1 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workNeuroscience: 3 fractional works · 1.1% of its workCellular and Molecular Neuroscience: 1 fractional works · 0.3% of its workNeurology: 1 fractional works · 0.2% of its workSmaller subfields together: 1 fractional works · 0.6% of its workAgricultural and Biological Sciences: 2 fractional works · 0.7% of its workPlant Science: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.4% of its workPharmacology, Toxicology and Pharmaceutics: 1 fractional works · 0.3% of its workPharmacology: 1 fractional works · 0.2% of its workSmaller subfields together: 0 fractional works · 0.1% of its workSocial Sciences: 15 fractional works · 6.0% of its workPsychology: 9 fractional works · 3.4% of its workClinical Psychology: 6 fractional works · 2.4% of its workSocial Psychology: 2 fractional works · 0.6% of its workSmaller subfields together: 1 fractional works · 0.3% of its workSocial Sciences: 3 fractional works · 1.4% of its workSociology and Political Science: 1 fractional works · 0.5% of its workHealth: 1 fractional works · 0.3% of its workSmaller subfields together: 1 fractional works · 0.6% of its workEconomics, Econometrics and Finance: 2 fractional works · 0.6% of its workEconomics and Econometrics: 1 fractional works · 0.5% of its workSmaller subfields together: 0 fractional works · 0.1% of its workArts and Humanities: 1 fractional works · 0.3% of its workDecision Sciences: 0 fractional works · 0.2% of its workBusiness, Management and Accounting: 0 fractional works · 0.1% of its workPhysical Sciences: 6 fractional works · 2.5% of its workEngineering: 3 fractional works · 1.2% of its workBiomedical Engineering: 2 fractional works · 0.8% of its workSafety, Risk, Reliability and Quality: 1 fractional works · 0.3% of its workSmaller subfields together: 0 fractional works · 0.2% of its workComputer Science: 1 fractional works · 0.5% of its workArtificial Intelligence: 1 fractional works · 0.5% of its workEnvironmental Science: 1 fractional works · 0.4% of its workEarth and Planetary Sciences: 1 fractional works · 0.2% of its workPaleontology: 1 fractional works · 0.2% of its workMathematics: 0 fractional works · 0.1% of its workChemical Engineering: 0 fractional works · 0.1% of its workChemistry: 0 fractional works · 0.1% of its workALL ITS WORKColombo NorthTeaching Hospital254fractional works, 2022-now
Life Sciences12%Physical Sciences3%Health Sciences80%Social Sciences6%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 23 fields, with their numbers
    1. Medicine18974.4%
    2. Health Professions103.8%
    3. Dentistry10.6%
    4. Veterinary10.5%
    5. Nursing10.4%
    1. Biochemistry, Genetics and Molecular Biology186.9%
    2. Immunology and Microbiology72.8%
    3. Neuroscience31.1%
    4. Agricultural and Biological Sciences20.7%
    5. Pharmacology, Toxicology and Pharmaceutics10.3%
    1. Psychology93.4%
    2. Social Sciences31.4%
    3. Economics, Econometrics and Finance20.6%
    4. Arts and Humanities10.3%
    5. Decision Sciences00.2%
    6. Business, Management and Accounting00.1%
    1. Engineering31.2%
    2. Computer Science10.5%
    3. Environmental Science10.4%
    4. Earth and Planetary Sciences10.2%
    5. Mathematics00.1%
    6. Chemical Engineering00.1%
    7. Chemistry00.1%
All of science, and how each field's share has moved since 1950: the Science domain explorer

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.15× its world share, 2 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.29× its world share, 18 worksBiochemistry, Geneti…Immunology and Microbiology: 2.75× its world share, 7 worksImmunology and Micro…Neuroscience: 0.70× its world share, 3 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.96× its world share, 1 worksPharmacology, Toxico…Chemical Engineering: 0.19× its world share, 0 worksChemical EngineeringChemistry: 0.04× its world share, 0 worksChemistryComputer Science: 0.07× its world share, 1 worksComputer ScienceEarth and Planetary Sciences: 0.14× its world share, 1 worksEarth and Planetary …Engineering: 0.08× its world share, 3 worksEngineeringEnvironmental Science: 0.07× its world share, 1 worksEnvironmental ScienceMathematics: 0.07× its world share, 0 worksMathematicsDentistry: 1.17× its world share, 1 worksDentistryHealth Professions: 1.44× its world share, 10 worksHealth ProfessionsMedicine: 3.87× its world share, 189 worksMedicineNursing: 0.77× its world share, 1 worksNursingVeterinary: 3.57× its world share, 1 worksVeterinaryArts and Humanities: 0.11× its world share, 1 worksArts and HumanitiesBusiness, Management and Accounting: 0.05× its world share, 0 worksBusiness, Management…Decision Sciences: 0.16× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.29× its world share, 2 worksEconomics, Econometr…Psychology: 1.11× its world share, 9 worksPsychologySocial Sciences: 0.11× its world share, 4 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Medicine, 3.9×. Every wedge is a field page.

All 23 fields, with their numbers
  1. Medicine3.87×189 works
  2. Veterinary3.57×1 works
  3. Immunology and Microbiology2.75×7 works
  4. Health Professions1.44×10 works
  5. Biochemistry, Genetics and Molecular Biology1.29×18 works
  6. Dentistry1.17×1 works
  7. Psychology1.11×9 works
  8. Pharmacology, Toxicology and Pharmaceutics0.96×1 works
  9. Nursing0.77×1 works
  10. Neuroscience0.70×3 works
  11. Economics, Econometrics and Finance0.29×2 works
  12. Chemical Engineering0.19×0 works
  13. Decision Sciences0.16×0 works
  14. Agricultural and Biological Sciences0.15×2 works
  15. Earth and Planetary Sciences0.14×1 works
  16. Arts and Humanities0.11×1 works
  17. Social Sciences0.11×4 works
  18. Engineering0.08×3 works
  19. Computer Science0.07×1 works
  20. Environmental Science0.07×1 works
  21. Mathematics0.07×0 works
  22. Business, Management and Accounting0.05×0 works
  23. Chemistry0.04×0 works

Who are the top researchers at Colombo North Teaching Hospital?

Ranked on the quality score, Gayani Premawansa, Suresh Mendis and Udena Ruwindu Attygalle lead among researchers whose main affiliation is Colombo North Teaching Hospital.

  1. 1 Gayani Premawansa Sri Lanka · #1,633,538 worldwide 1k citations · 56 works
  2. 2 Suresh Mendis Sri Lanka · #3,491,101 worldwide 545 citations · 23 works
  3. 3 Udena Ruwindu Attygalle Sri Lanka · #4,485,285 worldwide 119 citations · 19 works
  4. 4 M. A. C. Lakmal Sri Lanka · #4,549,988 worldwide 36 citations · 16 works
  5. 5 Nilmini Wijesuriya Sri Lanka · #4,906,183 worldwide 64 citations · 18 works
  6. 6 Chandrika Jayakanthi Subasinghe Sri Lanka · #5,004,706 worldwide 98 citations · 26 works
  7. 7 Sajith Siyambalapitiya Sri Lanka · #5,096,048 worldwide 522 citations · 29 works
  8. 8 Nisansala Liyanage Sri Lanka · #5,267,169 worldwide 27 citations · 17 works
  9. 9 Asurappulige Dayapala Sri Lanka · #5,352,503 worldwide 33 citations · 16 works
  10. 10 Chaminda Garusinghe Sri Lanka · #5,432,291 worldwide 112 citations · 25 works
All ranked researchers at Colombo North Teaching Hospital

What are the most cited papers from Colombo North Teaching Hospital?

The most cited paper from Colombo North Teaching Hospital is "Burden of 375 diseases and injuries, risk-attributable burden of 88 risk factors, and healthy life expectancy in 204 countries and territories, including 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023" (Simon I Hay et al., 2025), with 762 citations. Next come "Global burden of 292 causes of death in 204 countries and territories and 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023" (500) and "Global, regional, and national burden of chronic kidney disease in adults, 1990–2023, and its attributable risk factors: a systematic analysis for the Global Burden of Disease Study 2023" (366).

Most cited papers
#PaperReleasedCitations
1 Burden of 375 diseases and injuries, risk-attributable burden of 88 risk factors, and healthy life expectancy in 204 countries and territories, including 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023 Simon I Hay et al. · The Lancet Open access2,780 authors Oct 2025 762
2 Global burden of 292 causes of death in 204 countries and territories and 660 subnational locations, 1990–2023: a systematic analysis for the Global Burden of Disease Study 2023 Mohsen Naghavi et al. · The Lancet Open access2,463 authors Oct 2025 500
3 Global, regional, and national burden of chronic kidney disease in adults, 1990–2023, and its attributable risk factors: a systematic analysis for the Global Burden of Disease Study 2023 Patrick B Mark et al. · The Lancet Open access597 authors Nov 2025 366
4 The global, regional, and national burden of cancer, 1990–2023, with forecasts to 2050: a systematic analysis for the Global Burden of Disease Study 2023 Lisa M Force et al. · The Lancet Open access1,377 authors 25 Sep 2025 330
5 Unique phenotypes and clonal expansions of human CD4 effector memory T cells re-expressing CD45RA Yuan Tian et al. · Nature Communications Open access 7 Nov 2017 288
All 61 most cited papers, with filters and sorting

Which keywords describe research at Colombo North Teaching Hospital?

By fractional works in 2022-now, weighted toward what it does more of than the world: Epidemiology, Diagnosis, Treatment, Pathogenesis, Surgical Management, Complications, Risk Factors and Guidelines.

▲ more of its work than of the world's◆ about the world's share▼ less than the world's

Size is fractional works in 2022-now in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Epidemiology46▲ 4.6×90 topics
  2. Diagnosis19▲ 8.1×30 topics
  3. Treatment19▲ 6.1×36 topics
  4. Risk Factors11▲ 4.0×21 topics
  5. Inflammation10▲ 1.94×33 topics
  6. Pathogenesis10▲ 8.1×16 topics
  7. Management9▲ 4.5×20 topics
  8. Complications9▲ 7.2×12 topics
  9. Surgical Management9▲ 8.6×16 topics
  10. Cardiovascular Disease9▲ 3.0×23 topics
  11. Metabolic Syndrome8▲ 4.2×14 topics
  12. Guidelines8▲ 6.7×11 topics
  13. Mortality8▲ 5.2×9 topics
  14. Oxidative Stress7▲ 1.68×16 topics
  15. Quality of Life7▲ 1.91×18 topics
  16. COVID-197▲ 2.1×14 topics
  17. Clinical Practice Guidelines6▲ 4.5×12 topics
  18. Vaccine Development6▲ 9.7×8 topics
  19. Depression6▲ 2.7×11 topics
  20. Genetic Mutations6▲ 5.1×17 topics
  21. Clinical Trials6▲ 3.3×12 topics
  22. Immunotherapy6▲ 3.0×12 topics
  23. Children5▲ 9.0×5 topics
  24. Pathophysiology5▲ 7.0×7 topics
  25. Chronic Kidney Disease5▲ 7.8×8 topics
  26. Virulence5▲ 29×5 topics
  27. Immune Response5▲ 3.3×12 topics
  28. Insulin Resistance5▲ 4.2×5 topics
  29. Clinical Guidelines4▲ 5.7×8 topics
  30. Elderly4▲ 6.5×4 topics
  31. Surgery4▲ 4.5×7 topics
  32. Screening4▲ 16×2 topics
  33. Hemostasis4▲ 15×5 topics
  34. Anemia4▲ 15×3 topics
  35. Clinical Management4▲ 7.9×7 topics
  36. Genetic Variants4▲ 7.7×5 topics
  37. Toxins4▲ 13×3 topics
  38. Pulmonary Hypertension3▲ 9.5×3 topics
  39. Stroke3▲ 7.3×6 topics
  40. Adults3▲ 22×2 topics

Which research topics does Colombo North Teaching Hospital publish most on?

By volume in 2022-now: Colorectal Cancer Screening and Detection, Hemoglobinopathies and Related Disorders, Burkholderia infections and melioidosis and Liver Disease Diagnosis and Treatment.

Colorectal Cancer Screen…2Colorectal Cancer Screening and Detection: 2 fractional worksHemoglobinopathies and R…2Hemoglobinopathies and Related Disorders: 2 fractional worksBurkholderia infections and melioidosis: 2 fractional worksLiver Disease Diagnosis …2Liver Disease Diagnosis and Treatment: 2 fractional worksGastrointestinal disorde…2Gastrointestinal disorders and treatments: 2 fractional worksInfectious Diseases and Tuberculosis: 2 fractional worksLeptospirosis research and findings: 2 fractional worksGynecological conditions…2Gynecological conditions and treatments: 2 fractional worksClinical Laboratory Practices and Quality Control: 2 fractional worksLiver Disease and Transplantation: 2 fractional works
OncologyGeneticsEpidemiologySurgery4 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Colorectal Cancer Screening and Detection Oncology 2 works
  2. 2 Hemoglobinopathies and Related Disorders Genetics 2 works
  3. 3 Burkholderia infections and melioidosis Epidemiology 2 works
  4. 4 Liver Disease Diagnosis and Treatment Epidemiology 2 works
  5. 5 Gastrointestinal disorders and treatments Surgery 2 works
  6. 6 Infectious Diseases and Tuberculosis Surgery 2 works
  7. 7 Leptospirosis research and findings Parasitology 2 works
  8. 8 Gynecological conditions and treatments Obstetrics and Gynecology 2 works
  9. 9 Clinical Laboratory Practices and Quality Control Physiology 2 works
  10. 10 Liver Disease and Transplantation Hepatology 2 works

How open and international is its research?

Against the world's own shares: the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available83.9%not open16.1%

World: 40% of research is openly available.

with international co-authors8.2%domestic only91.8%

World: 18% is written across borders.

How has Colombo North Teaching Hospital's research output changed?

Output in 2022-2025 was 2% lower than in 2018-2021.

still counting1990200020102020
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 Colombo North Teaching Hospital as a percentage of every work published that year, 0.0011% in 2024.

still counting0.0010%0.0020%Colombo North Teaching Hospital0.00071% in 202519801990200020102020

Fractional works of Colombo North Teaching Hospital 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, against all institutions in the same year.

still counting5%10%15%all institutions10.0% in 2025Colombo North Teaching Hospital4.8% in 202520102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 4.8% in 2025.

Other research institutions in Colombo

All research institutions in Colombo

Share Colombo North Teaching Hospital's ranking

Colombo North Teaching Hospital on Science Explorer

A card with Colombo North Teaching Hospital's standing and the fields it leads in, for a post or a slide. A link to this page previews as the same card.

Download the card

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

Badges for a website1Each links back here and updates with every snapshot

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners have tabs of their own, above.

Discussion

Ask a question or share a note about Colombo North Teaching Hospital. Keep it to the research: no personal attacks, advertising or links. Any reader can report a post, which collapses it for everyone until it is opened.