World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
96
Citations
34040
World Ranking
9658
National Ranking
108

Wai K. Leung publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Wai K. Leung sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 711 publications — 82nd percentile

82% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Wai K. Leung D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Wai K. Leung sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 96 D-Index — 53rd percentile

53% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Wai K. Leung is affiliated with the University of Hong Kong in China and has contributed extensively to medical research, particularly in the field of gastroenterology. Their work spans multiple subfields including surgery, oncology, pulmonary and respiratory medicine, epidemiology, and infectious diseases.

Leung's research covers a range of topics central to gastroenterology and related areas. Main topics of their work include:

  • Gastric Cancer Management and Outcomes
  • Helicobacter pylori-related gastroenterology studies
  • Colorectal Cancer Screening and Detection
  • Microscopic Colitis
  • Inflammatory Bowel Disease
  • Gastroesophageal reflux and treatments
  • Eosinophilic Esophagitis

Their publications have appeared in several frequent venues such as:

  • Gastroenterology
  • Gastrointestinal Endoscopy
  • Helicobacter
  • Alimentary Pharmacology & Therapeutics
  • Gut

Among Leung's recent papers are:

  • "Gastrointestinal Manifestations of SARS-CoV-2 Infection and Virus Load in Fecal Samples From a Hong Kong Cohort: Systematic Review and Meta-analysis" (2020, Gastroenterology)
  • "Global prevalence of Helicobacter pylori infection between 1980 and 2022: a systematic review and meta-analysis" (2023, The Lancet. Gastroenterology & hepatology)
  • "Risk of autoimmune diseases following COVID-19 and the potential protective effect from vaccination: a population-based cohort study" (2023, EClinicalMedicine)
  • "Accuracy of artificial intelligence on histology prediction and detection of colorectal polyps: a systematic review and meta-analysis" (2020, Gastrointestinal Endoscopy)
  • "Aspirin Use and Risk of Colorectal Cancer Among Older Adults" (2021, JAMA Oncology)

Leung collaborates frequently with several researchers, including:

  • Ka Shing Cheung
  • Thomas Ka-Luen Lui
  • Chuan-Guo Guo
  • Wai-Kay Seto
  • Esther W. Chan

The main field of study for Leung is Medicine, with a significant focus on subfields that cross pathology, treatment, and epidemiological analysis of gastrointestinal diseases and cancers. Leung's body of research provides insights into the management of infections such as Helicobacter pylori and the complex interplay between gastrointestinal health and systemic diseases like COVID-19. Their work on cancer screening and the use of technologies such as artificial intelligence in diagnostics reflects an interdisciplinary approach to medical research.

Best Publications

  • Gastrointestinal Manifestations of SARS-CoV-2 Infection and Virus Load in Fecal Samples From a Hong Kong Cohort: Systematic Review and Meta-analysis.

    Ka Shing Cheung;Ivan F.N. Hung;Pierre P.Y. Chan;K. C. Lung

  • Screening for gastric cancer in Asia: current evidence and practice

    Wai K Leung;Ming-shiang Wu;Yasuo Kakugawa;Jae J Kim

  • Increasing incidence of colorectal cancer in Asia: implications for screening

    Joseph Jy Sung;James Yw Lau;KL Goh;WK Leung

  • Clopidogrel versus aspirin and esomeprazole to prevent recurrent ulcer bleeding.

    Francis K L Chan;Jessica Y L Ching;Lawrence C T Hung;Vincent W S Wong

  • Preventing Recurrent Upper Gastrointestinal Bleeding in Patients With Helicobacter Pylori Infection Who Are Taking Low-Dose Aspirin or Naproxen

    Francis K.L. Chan;S.C. Sydney Chung;Bing Yee Suen;Yuk Tong Lee

  • Enteric involvement of severe acute respiratory syndrome-associated coronavirus infection.

    Wai K Leung;Ka-fai To;Paul K.S Chan;Henry L.Y Chan

  • Celecoxib versus diclofenac and omeprazole in reducing the risk of recurrent ulcer bleeding in patients with arthritis.

    Francis K L Chan;Lawrence C T Hung;Bing Y Suen;Justin C Y Wu

  • Factors predicting progression of gastric intestinal metaplasia: results of a randomised trial on Helicobacter pylori eradication

    W K Leung;S-R Lin;J Y L Ching;K-F To

  • Enteric involvement of severe acute respiratory syndrome-associated coronavirus infection1 1The authors thank Man-yee Yung, Sara Fung, Dr. Bonnie Kwan, and Dr. Thomas Li for their help in retrieving patient information.

    Wai K Leung;Ka-fai To;Paul K.S Chan;Henry L.Y Chan

  • Combination of a cyclo-oxygenase-2 inhibitor and a proton-pump inhibitor for prevention of recurrent ulcer bleeding in patients at very high risk: a double-blind, randomised trial

    Francis Ka Leung Chan;Vincent Wai Sun Wong;Bing Yee Suen;Justin Che Yuen Wu

  • Atrophy and intestinal metaplasia one year after cure of H. pylori infection: A prospective, randomized study

    Joseph J.Y. Sung;San–Rin Lin;Jessica Y.L. Ching;Li–Ya Zhou

  • Eradication of Helicobacter pylori and risk of peptic ulcers in patients starting long-term treatment with non-steroidal anti-inflammatory drugs: a randomised trial

    Francis K L Chan;K F To;Justin C Y Wu;M Y Yung

  • Long-term proton pump inhibitors and risk of gastric cancer development after treatment for Helicobacter pylori: A population-based study

    Ka Shing Cheung;Esther W Chan;Angel Y S Wong;Lijia Chen

  • Omeprazole before endoscopy in patients with gastrointestinal bleeding.

    James Y. Lau;Wai K. Leung

  • Microbiology of Odontogenic Bacteremia: beyond Endocarditis

    N. B. Parahitiyawa;L. J. Jin;W. K. Leung;W. C. Yam

  • Cyclooxygenase-2 Expression in Helicobacter pylori-Associated Premalignant and Malignant Gastric Lesions

    Joseph J.Y. Sung;Wai K. Leung;Minnie Y.Y. Go;Ka F. To

  • Detection of gene promoter hypermethylation in the tumor and serum of patients with gastric carcinoma.

    Tin-Lap Lee;Wai K Leung;Michael W Y Chan;Enders K W Ng

  • The Effect of Endoscopic Therapy in Patients Receiving Omeprazole for Bleeding Ulcers with Nonbleeding Visible Vessels or Adherent Clots: A Randomized Comparison

    Joseph J.Y. Sung;Francis K.L. Chan;James Y.W. Lau;Man-Yee Yung

  • Fecal Viral Load and Norovirus-associated Gastroenteritis

    Martin C.W. Chan;Joseph J.Y. Sung;Rebecca K.Y. Lam;Paul K.S. Chan

  • Prevention of Dabigatran-Related Gastrointestinal Bleeding With Gastroprotective Agents: A Population-Based Study

    Esther W. Chan;Wallis C.Y. Lau;Wai K. Leung;Michael T.C. Mok

Frequent Co-Authors

Joseph J.Y. Sung
Joseph J.Y. Sung Nanyang Technological University
Francis K.L. Chan
Francis K.L. Chan Chinese University of Hong Kong
Lijian Jin
Lijian Jin University of Hong Kong
Jun Yu
Jun Yu Chinese University of Hong Kong
Ian C. K. Wong
Ian C. K. Wong University of Hong Kong
James Y.W. Lau
James Y.W. Lau Chinese University of Hong Kong
Justin C.Y. Wu
Justin C.Y. Wu Chinese University of Hong Kong
Lakshman P. Samaranayake
Lakshman P. Samaranayake University of Hong Kong
Ka-Fai To
Ka-Fai To Chinese University of Hong Kong
Ivan Hung
Ivan Hung University of Hong Kong

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