World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Medicine 96 9657 9063 108 103 711 34040

Wai K. Leung publications per year

The chart shows the history of publications by Wai K. Leung between 1987 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Wai K. Leung published across 39 years, from 1987 to 2025, averaging 21.5 papers a year. Output peaked at 43 publications in 2019. 65 of the 840 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1987 to 2025. Vertical axis: number of publications, 0 to 43. Peak 43 publications in 2019. 1987: 1 publication 1988: 0 publications 1989: 0 publications 1990: 1 publication 1991: 0 publications 1992: 1 publication 1993: 2 publications 1994: 1 publication 1995: 4 publications 1996: 2 publications 1997: 10 publications 1998: 26 publications 1999: 15 publications 2000: 27 publications 2001: 38 publications 2002: 29 publications 2003: 38 publications 2004: 35 publications 2005: 34 publications 2006: 38 publications 2007: 28 publications 2008: 40 publications 2009: 16 publications 2010: 24 publications 2011: 9 publications 2012: 13 publications 2013: 20 publications 2014: 19 publications 2015: 27 publications 2016: 31 publications 2017: 32 publications 2018: 35 publications 2019: 43 publications 2020: 42 publications 2021: 40 publications 2022: 28 publications 2023: 26 publications 2024: 40 publications 2025: 25 publications
1987 2025

840 publications in total across all disciplines

View publications per year as a table
Wai K. Leung: publications per year, 1987 to 2025
Year Publications
1987 1
1988 0
1989 0
1990 1
1991 0
1992 1
1993 2
1994 1
1995 4
1996 2
1997 10
1998 26
1999 15
2000 27
2001 38
2002 29
2003 38
2004 35
2005 34
2006 38
2007 28
2008 40
2009 16
2010 24
2011 9
2012 13
2013 20
2014 19
2015 27
2016 31
2017 32
2018 35
2019 43
2020 42
2021 40
2022 28
2023 26
2024 40
2025 25
Total 840
Download as CSV

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.

No. of scientists
200 400 600 800
Bar chart with 86 bars. Horizontal axis: publications, 101–120 to 1,796+. Vertical axis: number of scientists, 0 to 922. Most scientists, 922, have 341–360 publications. The last bar groups every scientist with 1,796 publications or more. The highlighted bar, 701–720 publications, is where this scientist sits. 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: 610 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
101–120 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.

View publications distribution as a table
Number of Medicine scientists by publication count, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
Publications Scientists This scientist
101–120 5
121–140 26
141–160 73
161–180 155
181–200 230
201–220 363
221–240 487
241–260 545
261–280 722
281–300 768
301–320 834
321–340 895
341–360 922
361–380 838
381–400 861
401–420 918
421–440 806
441–460 771
461–480 751
481–500 713
501–520 617
521–540 610
541–560 537
561–580 504
581–600 509
601–620 396
621–640 386
641–660 371
661–680 340
681–700 336
701–720 307 711
721–740 259
741–760 230
761–780 228
781–800 217
801–820 204
821–840 186
841–860 177
861–880 155
881–900 139
901–920 145
921–940 116
941–960 133
961–980 91
981–1,000 96
1,001–1,020 77
1,021–1,040 70
1,041–1,060 63
1,061–1,080 77
1,081–1,100 49
1,101–1,120 54
1,121–1,140 49
1,141–1,160 51
1,161–1,180 35
1,181–1,200 39
1,201–1,220 26
1,221–1,240 37
1,241–1,260 36
1,261–1,280 27
1,281–1,300 32
1,301–1,320 28
1,321–1,340 17
1,341–1,360 30
1,361–1,380 28
1,381–1,400 17
1,401–1,420 21
1,421–1,440 15
1,441–1,460 12
1,461–1,480 12
1,481–1,500 18
1,501–1,520 14
1,521–1,540 17
1,541–1,560 15
1,561–1,580 6
1,581–1,600 2
1,601–1,620 12
1,621–1,640 11
1,641–1,660 8
1,661–1,680 5
1,681–1,700 5
1,701–1,720 10
1,721–1,740 12
1,741–1,760 14
1,761–1,780 6
1,781–1,795 5
1,796+ 100
Download as CSV

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.

No. of scientists
250 500 750 1,000
Bar chart with 75 bars. Horizontal axis: D-Index, 70–71 to 217+. Vertical axis: number of scientists, 0 to 1,027. Most scientists, 1,027, have 82–83 D-Index. The last bar groups every scientist with 217 D-Index or more. The highlighted bar, 96–97 D-Index, is where this scientist sits. 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: 399 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
70–71 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.

View D-Index distribution as a table
Number of Medicine scientists by D-index, Research.com 2026 ranking edition. Based on 20,134 ranked scientists.
D-Index Scientists This scientist
70–71 226
72–73 391
74–75 574
76–77 730
78–79 891
80–81 972
82–83 1,027
84–85 1,003
86–87 960
88–89 970
90–91 922
92–93 839
94–95 808
96–97 779 96
98–99 668
100–101 611
102–103 630
104–105 513
106–107 541
108–109 445
110–111 429
112–113 399
114–115 393
116–117 318
118–119 302
120–121 287
122–123 255
124–125 256
126–127 252
128–129 230
130–131 179
132–133 168
134–135 163
136–137 159
138–139 134
140–141 134
142–143 118
144–145 109
146–147 106
148–149 74
150–151 79
152–153 80
154–155 87
156–157 57
158–159 74
160–161 69
162–163 60
164–165 53
166–167 39
168–169 42
170–171 32
172–173 39
174–175 40
176–177 28
178–179 19
180–181 23
182–183 31
184–185 18
186–187 20
188–189 22
190–191 13
192–193 21
194–195 12
196–197 12
198–199 14
200–201 15
202–203 13
204–205 10
206–207 8
208–209 4
210–211 12
212–213 11
214–215 10
216 4
217+ 98
Download as CSV

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

  • 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

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Exploring a future in Medicine doesn’t always follow a single path. Many students and professionals consider online degree options to accelerate or expand their careers. One popular choice is applying to the shortest dnp program, which allows registered nurses to earn a Doctor of Nursing Practice degree as quickly as possible.

If you’re seeking a quicker entry-point into healthcare, a 6 month lpn program online might be ideal. These programs provide practical nursing credentials in less than a year, perfect for those eager to enter the workforce sooner.

Mental health is a growing specialization. For nursing professionals interested in this field, there are dedicated psych nurse practitioner programs that focus on psychiatric and mental health care—an area of high demand across the USA.

Not all healthcare careers involve direct patient care. If you prefer a role in management or administration, consider the cheapest online healthcare administration degree options. These degrees can open doors to leadership roles in hospitals and clinics.

Best Scientists Citing Wai K. Leung

Trending Scientists

Recently Published Articles