Philip N. Okafor

446 total citations
32 papers, 299 citations indexed

About

Philip N. Okafor is a scholar working on Epidemiology, Oncology and Surgery. According to data from OpenAlex, Philip N. Okafor has authored 32 papers receiving a total of 299 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Epidemiology, 11 papers in Oncology and 10 papers in Surgery. Recurrent topics in Philip N. Okafor's work include Pneumocystis jirovecii pneumonia detection and treatment (6 papers), Tuberculosis Research and Epidemiology (5 papers) and Microscopic Colitis (4 papers). Philip N. Okafor is often cited by papers focused on Pneumocystis jirovecii pneumonia detection and treatment (6 papers), Tuberculosis Research and Epidemiology (5 papers) and Microscopic Colitis (4 papers). Philip N. Okafor collaborates with scholars based in United States, Canada and Italy. Philip N. Okafor's co-authors include Francis A. Farraye, David Nunes, Jayant A. Talwalkar, Robert S. Sandler, Millie D. Long, Michael D. Kappelman, Berkeley N. Limketkai, David Limsui, Christopher Martin and Derrick J. Stobaugh and has published in prestigious journals such as Gastroenterology, Journal of Hepatology and The American Journal of Gastroenterology.

In The Last Decade

Philip N. Okafor

29 papers receiving 293 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Philip N. Okafor United States 11 157 94 81 74 38 32 299
Nimisha Parekh United States 11 135 0.9× 39 0.4× 107 1.3× 148 2.0× 23 0.6× 33 372
Usha Chauhan Canada 11 156 1.0× 48 0.5× 99 1.2× 203 2.7× 30 0.8× 27 331
Jennifer Strople United States 8 69 0.4× 56 0.6× 70 0.9× 92 1.2× 15 0.4× 15 312
Karen Boland Ireland 11 108 0.7× 36 0.4× 76 0.9× 124 1.7× 25 0.7× 35 275
Raffi Lev‐Tzion Israel 12 160 1.0× 73 0.8× 100 1.2× 277 3.7× 46 1.2× 33 447
Zaid Ardalan Australia 9 84 0.5× 58 0.6× 74 0.9× 115 1.6× 21 0.6× 28 275
Christos Tzivinikos United Kingdom 9 83 0.5× 30 0.3× 197 2.4× 107 1.4× 25 0.7× 34 404
Webber Chan Singapore 13 225 1.4× 48 0.5× 168 2.1× 319 4.3× 84 2.2× 37 553
Jane Cooke-Lauder Canada 7 244 1.6× 30 0.3× 148 1.8× 350 4.7× 32 0.8× 9 491
Kathryn Ritchie Australia 8 89 0.6× 22 0.2× 37 0.5× 79 1.1× 17 0.4× 12 274

Countries citing papers authored by Philip N. Okafor

Since Specialization
Citations

This map shows the geographic impact of Philip N. Okafor'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 Philip N. Okafor with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Philip N. Okafor more than expected).

Fields of papers citing papers by Philip N. Okafor

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Philip N. Okafor. 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 Philip N. Okafor. The network helps show where Philip N. Okafor may publish in the future.

Co-authorship network of co-authors of Philip N. Okafor

This figure shows the co-authorship network connecting the top 25 collaborators of Philip N. Okafor. A scholar is included among the top collaborators of Philip N. Okafor 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 Philip N. Okafor. Philip N. Okafor is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
2.
Rubens, Muni, et al.. (2023). Trends in gastrointestinal disease hospitalizations and outcomes during the first year of the coronavirus pandemic. World Journal of Gastroenterology. 29(4). 744–757. 4 indexed citations
3.
Youssef, Michael, et al.. (2023). A nationwide study of liver disease hospitalizations during the coronavirus pandemic in the United States. Journal of Gastroenterology and Hepatology. 38(7). 1148–1157. 4 indexed citations
4.
Youssef, Michael, et al.. (2023). A63 TRENDS AND OUTCOMES OF LIVER DISEASE HOSPITALIZATIONS DURING THE CORONAVIRUS PANDEMIC IN THE UNITED STATES: A NATIONWIDE POPULATION-LEVEL ANALYSIS. Journal of the Canadian Association of Gastroenterology. 6(Supplement_1). 34–35. 1 indexed citations
5.
Alayo, Quazim A., et al.. (2022). Healthcare Disparities Among Homeless Patients Hospitalized With Gastrointestinal Bleeding. Journal of Clinical Gastroenterology. 57(7). 707–713. 3 indexed citations
6.
Weingarden, Alexa R., Berkeley N. Limketkai, David M. Goldenberg, et al.. (2022). Delivery of Fecal Material to Terminal Ileum Is Associated with Long-Term Success of Fecal Microbiota Transplantation. Digestive Diseases and Sciences. 68(5). 2006–2014. 4 indexed citations
7.
Okafor, Philip N., Alex Dahlen, Michael Youssef, et al.. (2022). Environmental Pollutants Are Associated With Irritable Bowel Syndrome in a Commercially Insured Cohort of California Residents. Clinical Gastroenterology and Hepatology. 21(6). 1617–1626.e9. 16 indexed citations
8.
Dennis, Brittany B., et al.. (2021). The fragility of randomized placebo‐controlled trials for irritable bowel syndrome. Neurogastroenterology & Motility. 33(8). e14166–e14166. 1 indexed citations
9.
Alayo, Quazim A., et al.. (2020). S0623 Time Trends and Outcomes of Inter-Hospital Transfer in Patients With Upper Gastrointestinal Bleeding: A Nationwide Analysis. The American Journal of Gastroenterology. 115(1). S311–S312. 1 indexed citations
10.
Okafor, Philip N., et al.. (2018). Rising Incidence of Intestinal Infections in Inflammatory Bowel Disease: A Nationwide Analysis. Inflammatory Bowel Diseases. 24(8). 1849–1856. 31 indexed citations
11.
Okafor, Philip N., Kristi M. Swanson, Nilay D. Shah, & Jayant A. Talwalkar. (2018). Endoscopic ultrasound for rectal cancer staging: A population‐based study of utilization, impact on treatment patterns, and survival. Journal of Gastroenterology and Hepatology. 33(8). 1469–1476. 7 indexed citations
12.
Okafor, Philip N., Derrick J. Stobaugh, Michelle van Ryn, & Jayant A. Talwalkar. (2016). African Americans Have Better Outcomes for Five Common Gastrointestinal Diagnoses in Hospitals With More Racially Diverse Patients. The American Journal of Gastroenterology. 111(5). 649–657. 9 indexed citations
13.
Okafor, Philip N., Derrick J. Stobaugh, Louis M. Wong Kee Song, Paul J. Limburg, & Jayant A. Talwalkar. (2016). Socioeconomic Inequalities in the Utilization of Colorectal Stents for the Treatment of Malignant Bowel Obstruction. Digestive Diseases and Sciences. 61(6). 1669–1676. 6 indexed citations
14.
Okafor, Philip N., et al.. (2015). Cost-effectiveness of Prophylaxis Against Pneumocystis jiroveci Pneumonia in Patients with Crohn’s Disease. Digestive Diseases and Sciences. 60(12). 3743–3755. 9 indexed citations
15.
Okafor, Philip N., et al.. (2015). Determinants of Palliative Care Utilization Among Patients Hospitalized With Metastatic Gastrointestinal Malignancies. American Journal of Hospice and Palliative Medicine®. 34(3). 269–274. 20 indexed citations
16.
Okafor, Philip N., Sigrid Bairdain, Donald C. Simonson, et al.. (2014). Effect of vagotomy during Roux-en-Y gastric bypass surgery on weight loss outcomes. Obesity Research & Clinical Practice. 9(3). 274–280. 19 indexed citations
17.
Okafor, Philip N., et al.. (2013). Cost-effectiveness of Nonmelanoma Skin Cancer Screening in Crohnʼs Disease Patients. Inflammatory Bowel Diseases. 19(13). 2787–2795. 11 indexed citations
18.
Okafor, Philip N., Sharmeel K. Wasan, & Francis A. Farraye. (2013). Pneumocystis Jiroveci Pneumonia in Patients with Inflammatory Bowel Disease. Inflammatory Bowel Diseases. 19(4). 812–817. 14 indexed citations
19.
Okafor, Philip N., David Nunes, & Francis A. Farraye. (2013). Pneumocystis Jiroveci Pneumonia in Inflammatory Bowel Disease. Inflammatory Bowel Diseases. 19(8). 1764–1771. 32 indexed citations
20.
Long, Millie D., Francis A. Farraye, Philip N. Okafor, et al.. (2013). Increased Risk of Pneumocystis Jiroveci Pneumonia Among Patients with Inflammatory Bowel Disease. Inflammatory Bowel Diseases. 19(5). 1018–1024. 50 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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