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Evolving Trends and Collaborative Networks in Postoperative Delirium Research: A Two-Decade Bibliometric Analysis
Kehan Wang1, Cheng Xu1, Yuan Zhu1
1Department of Anesthesiology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Brain and Behavior
|June 22, 2026
Summary
Bibliometric analysis reveals a significant increase in research on postoperative delirium (POD) since 2019, with a growing focus on prediction and biomarkers for improved management in older adults.
Area of Science:
- Geriatric Medicine
- Neuroscience
- Bibliometrics
Background:
- Postoperative delirium (POD) is a common complication in hospitalized older adults.
- Its complex causes and management are not fully understood.
Purpose of the Study:
- To analyze publication trends, collaborations, and research themes in POD over two decades.
- To identify key areas for future investigation.
Main Methods:
- Bibliometric analysis of 1937 English-language articles (2004-2024) from Web of Science.
- Utilized CiteSpace and VOSviewer for data analysis.
Main Results:
- Publication output accelerated significantly after 2019.
- China led in volume; USA led in citations and collaboration centrality.
- Four research domains identified: characteristics, mechanisms, prediction, and interventions.
- Recent growth focuses on prediction and biomarkers.
Conclusions:
- POD research is evolving, with increasing interest in predictive analytics and biomarkers.
- Findings guide future research and interdisciplinary strategies for POD management in older surgical patients.
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