Copyright ©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Transplant. Dec 18, 2023; 13(6): 391-402
Published online Dec 18, 2023. doi: 10.5500/wjt.v13.i6.391
Unveiling transplantation research productivity of United States: A bibliometric analysis
Badi Rawashdeh, Saif Aldeen AlRyalat, Mohammad Abuassi, Raj Prasad, Matthew Cooper
Badi Rawashdeh, Raj Prasad, Matthew Cooper, Department of Transplant Surgery, Medical College of Wisconsin, Milwaukee, WI 53202, United States
Saif Aldeen AlRyalat, School of Mediine, Jordan University, Amman 11100, Jordan
Mohammad Abuassi, Department of Internal Medicine, Jordan Hospital, Amman 00962, Jordan
Author contributions: Rawashdeh B and Alryalat SA contribute to planning and writing, VOSviewer analysis; Abuassi M contribute to literature review; Prasad R contribute to critical revision; Cooper M contribute to critical revision; all authors have read and approved the final manuscript.
Conflict-of-interest statement: No conflict of interest to disclose. the authors didn't receive any fund for this study.
PRISMA 2009 Checklist statement: The authors have read the PRISMA 2009 Checklist, and the manuscript was prepared and revised according to the PRISMA 2009 Checklist.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See:
Corresponding author: Badi Rawashdeh, MD, Surgeon, Department of Transplant Surgery, Medical College of Wisconsin, No. 9200 w wisconsin ave milwaukee, Milwaukee, WI 53202, United States.
Received: August 2, 2023
Peer-review started: August 2, 2023
First decision: September 4, 2023
Revised: September 11, 2023
Accepted: September 22, 2023
Article in press: September 22, 2023
Published online: December 18, 2023

The United States has witnessed significant advancements in the field of organ transplantation over the course of the last five decades, as demonstrated by a notable increase in the quantity of academic research. The presence of a highly dynamic research environment necessitates continuous evaluations to maintain the integrity and progress of the field.


To evaluate the total output and thematic emphasis of transplant research conducted in the United States.


On January 10, 2023, we conducted a bibliometric search of United States research output in transplantation journals from the Web of Science database's Science Citation Index Expanded. We excluded editorials, meeting abstracts, and other non-article types. We analyzed annual trends, authors, institutions, articles, keywords, and countries collaborating with the United States, using VOSviewer 1.6.18 to create figures and tables.


The United States published 25956 papers (3078 reviews and 22878 articles) representing 37.7% of the world's scientific output. Canada emerged as the top collaborator with the United States, co-authoring 1263 articles. Leading institutions in United States transplantation research were the University of Pittsburgh (1749 articles), Mayo Clinic (1605 articles), Harvard Medical School (1549 articles), and Johns Hopkins University (1280 articles). The top three keywords with over 2000 occurrences were "recipients," "survival," and "outcomes," indicating a focus on graft and recipient outcome markers by United States researchers.


Our findings demonstrate the United States leadership in organ transplantation research, contributing significantly to the global scientific output in this field. However, opportunities exist for fostering expansive partnerships, particularly with developing countries. This study provides valuable insights into the transplantation research landscape in the United States, emphasizing the importance of ongoing evaluations to maintain and propel advancements in this critical medical discipline. The results may facilitate future collaborations, knowledge exchange, and the pursuit of innovative solutions in the realm of organ transplantation.

Keywords: Scientometrics, Bibliometrics, Research output, Organ transplantation, United States

Core Tip: This manuscript presents a compelling bibliometric analysis exploring the United States's pioneering productivity in the field of organ transplantation research. The study delves into 50 years of academic publications, providing valuable insights into annual trends, key authors, institutions, top keywords, and international collaborations. With 25956 papers published, representing 37.7% of the world's output, this research highlights the United States dominant position. The findings emphasize the significance of ongoing evaluations in sustaining advancements and fostering potential collaborations. Reviewers will appreciate the comprehensive approach and the potential to shape future research directions in transplantation.