Nelson Ndegwa

3.3k total citations
22 papers, 281 citations indexed

About

Nelson Ndegwa is a scholar working on Surgery, Epidemiology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Nelson Ndegwa has authored 22 papers receiving a total of 281 indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Surgery, 8 papers in Epidemiology and 6 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Nelson Ndegwa's work include Liver Disease Diagnosis and Treatment (5 papers), Esophageal Cancer Research and Treatment (5 papers) and Esophageal and GI Pathology (5 papers). Nelson Ndegwa is often cited by papers focused on Liver Disease Diagnosis and Treatment (5 papers), Esophageal Cancer Research and Treatment (5 papers) and Esophageal and GI Pathology (5 papers). Nelson Ndegwa collaborates with scholars based in Sweden, United Kingdom and United States. Nelson Ndegwa's co-authors include Hannes Hagström, Alexander Ploner, Weimin Ye, Fredrik Klevebro, Anders F. Andersson, Ioannis Rouvelas, Tony Axéll, Ann Roosaar, Zhiwei Liu and Peter D’Eustachio and has published in prestigious journals such as SHILAP Revista de lepidopterología, Scientific Reports and Journal of Hepatology.

In The Last Decade

Nelson Ndegwa

22 papers receiving 277 citations

Peers

Nelson Ndegwa

SURGE

PRM

EPIDE

HEPAT

Ming Su China

Aunchalee Jaroenlapnopparat United States

Yun Ju Jo South Korea

Dong Hee Ryu South Korea

Chi Hyuk Oh South Korea

Nooman Gilani United States

Hyeon Seon Ahn South Korea

Banu Kara Türkiye

Ana García García de Paredes Spain

Chien‐Chu Lin Taiwan

Ming Su China

Nelson Ndegwa

162 ×1.2

SURGE

89 ×0.8

PRM

52 ×0.8

48 ×1.0

EPIDE

36 ×0.9

HEPAT

Citations per year, relative to Nelson Ndegwa Nelson Ndegwa (= 1×) peers Ming Su

Countries citing papers authored by Nelson Ndegwa

Since Specialization

Citations

This map shows the geographic impact of Nelson Ndegwa's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Nelson Ndegwa with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Nelson Ndegwa more than expected).

Fields of papers citing papers by Nelson Ndegwa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Nelson Ndegwa. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Nelson Ndegwa. The network helps show where Nelson Ndegwa may publish in the future.

Co-authorship network of co-authors of Nelson Ndegwa

This figure shows the co-authorship network connecting the top 25 collaborators of Nelson Ndegwa. A scholar is included among the top collaborators of Nelson Ndegwa based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Nelson Ndegwa. Nelson Ndegwa is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ndegwa, Nelson, et al.. (2025). Meningococcal vaccination disparities in the United States (2010–2021): Findings from the National Immunization Survey-Teen and a commercial insurance database. Human Vaccines & Immunotherapeutics. 21(1). 2479338–2479338. 1 indexed citations

Nasr, Patrik, Erik von Seth, Raphaela Mayerhofer, et al.. (2023). Incidence, prevalence and mortality of chronic liver diseases in Sweden between 2005 and 2019. European Journal of Epidemiology. 38(9). 973–984. 15 indexed citations

Kwiatkowska, Marta, et al.. (2023). 1143. Meningococcal Vaccination Coverage Disparities in the United States: An Analysis with 2016-2021 National Immunization Survey-Teen Data. Open Forum Infectious Diseases. 10(Supplement_2). 2 indexed citations

Kvarnström, Marika, Greger Lindberg, Nelson Ndegwa, et al.. (2022). High prevalence of gastrointestinal symptoms in patients with primary Sjögren’s syndrome cannot be attributed to pancreatic exocrine insufficiency. Scandinavian Journal of Gastroenterology. 57(10). 1250–1256. 7 indexed citations

Villard, Christina, Nelson Ndegwa, Carl Jorns, et al.. (2022). Prediction of survival in patients with colorectal liver metastases- development and validation of a prognostic score model. European Journal of Surgical Oncology. 48(12). 2432–2439. 9 indexed citations

Ndegwa, Nelson, Mats Lindblad, Gustav Linder, et al.. (2022). Population-Based Cohort Study from a Prospective National Registry: Better Long-Term Survival in Esophageal Cancer After Minimally Invasive Compared with Open Transthoracic Esophagectomy. Annals of Surgical Oncology. 29(9). 5609–5621. 10 indexed citations

Wester, Axel, Nelson Ndegwa, & Hannes Hagström. (2022). Risk of Fractures and Subsequent Mortality in Alcohol-Related Cirrhosis: A Nationwide Population-Based Cohort Study. Clinical Gastroenterology and Hepatology. 21(5). 1271–1280.e7. 9 indexed citations

Wester, Axel, Nelson Ndegwa, & Hannes Hagström. (2022). Risk of fractures and subsequent mortality in alcohol-related cirrhosis: a nationwide population-based cohort study. Journal of Hepatology. 77. S123–S123. 1 indexed citations

Nasr, Patrik, Nelson Ndegwa, Erik von Seth, Jonas F. Ludvigsson, & Hannes Hagström. (2022). Incidence, prevalence and mortality of chronic liver diseases in Sweden between 2005 and 2019. Journal of Hepatology. 77. S82–S82. 4 indexed citations

10.

Ndegwa, Nelson, et al.. (2021). External validation of the Toronto hepatocellular carcinoma risk index in a Swedish population. JHEP Reports. 3(5). 100343–100343. 8 indexed citations

11.

Tsekrekos, Andrianos, Andrea Lovece, Dimosthenis Chrysikos, et al.. (2021). Impact of obesity on the outcomes after gastrectomy for gastric cancer: A meta-analysis. Asian Journal of Surgery. 45(1). 15–26. 24 indexed citations

12.

Klevebro, Fredrik, et al.. (2021). Short-course compared to long-course palliative radiotherapy for oesophageal cancer: a single centre observational cohort study. Radiation Oncology. 16(1). 153–153. 7 indexed citations

13.

Huang, Biying, et al.. (2021). Postoperative hiatal herniation after open vs. minimally invasive esophagectomy; a systematic review and meta-analysis. International Journal of Surgery. 93. 106046–106046. 13 indexed citations

14.

Tsekrekos, Andrianos, Michael Vieth, Nelson Ndegwa, et al.. (2021). Interobserver agreement of a gastric adenocarcinoma tumor regression grading system that incorporates assessment of lymph nodes. Human Pathology. 116. 94–101. 7 indexed citations

15.

Hagström, Hannes, Nelson Ndegwa, Mattias Ekstedt, et al.. (2021). Morbidity, risk of cancer and mortality in 3645 HFE mutations carriers. Liver International. 41(3). 545–553. 10 indexed citations

16.

Omae, Masami, Hannes Hagström, Nelson Ndegwa, et al.. (2021). Wide-field endoscopic submucosal dissection for the treatment of Barrett’s esophagus neoplasia. SHILAP Revista de lepidopterología. 9(5). E727–E734. 4 indexed citations

17.

Hu, Yue, Nelson Ndegwa, Johannes Alneberg, et al.. (2018). Stationary and portable sequencing-based approaches for tracing wastewater contamination in urban stormwater systems. Scientific Reports. 8(1). 11907–11907. 23 indexed citations

18.

Ndegwa, Nelson, Alexander Ploner, Zhiwei Liu, et al.. (2018). Association between poor oral health and gastric cancer: A prospective cohort study. International Journal of Cancer. 143(9). 2281–2288. 33 indexed citations

19.

Haw, Robin, David Croft, Christina K. Yung, et al.. (2011). The Reactome BioMart. Database. 2011(0). bar031–bar031. 27 indexed citations

20.

Ndegwa, Nelson, Richard G. Côté, David Ovelleiro, et al.. (2011). Critical amino acid residues in proteins: a BioMart integration of Reactome protein annotations with PRIDE mass spectrometry data and COSMIC somatic mutations. Database. 2011. bar047–bar047. 5 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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