Long Coronavirus Disease 2019 and its Association with Noncommunicable Diseases: A Bibliometric Analysis

Abstract Background: Long coronavirus disease 2019 (COVID-19), or post-acute sequelae of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) infection, has emerged as a major global health concern. Its relationship with noncommunicable diseases (NCDs) remains underexplored despite overlapping pathophysiological pathways. Objectives: This bibliometric analysis evaluates global research trends, key contributors, and thematic clusters at the intersection of long COVID-19 and NCDs. Materials and Methods: A comprehensive search was conducted in Scopus and Web of Science databases using relevant MeSH and/or keyword combinations. Bibliometric indicators including publication trends, prolific authors and country collaboration networks analyzed using VOSviewer and R Bibliometrix. Results: Fifty-five relevant publications were identified between 2020 and 2024. Research activity peaked in 2023, dominated by studies on cardiovascular, metabolic, and respiratory comorbidities. Collaboration networks showed strong contributions from China, the United States, and the United Kingdom. However, limited representation was observed from low- and middle-income countries (LMICs). Conclusion: This bibliometric analysis highlights a growing but uneven global research landscape linking long COVID-19 and NCDs. Cardiovascular and metabolic disorders have received significant attention, whereas neurological and oncological sequelae remain underinvestigated. Future research must strengthen interdisciplinary collaboration and address the inequitable participation of LMICs.