Pulmonary Hypertension: Scientometric Analysis and Density-Equalizing Mapping

Abstract

Pulmonary hypertension (PH) is characterized by the increase of the mean pulmonary arterial pressure in the lung circulation. Despite the large number of experimental and clinical studies conducted on pulmonary hypertension, there is no comprehensive work that analyzed the global research activity on PH so far. We retrieved the bibliometric data of the publications on pulmonary hypertension for two periods from the Web of science database. Here, we set the first investigation period from 1900 to 2007 (t1) due to the cited half life of articles and the relating difficulties to interpret the citation parameters. The second evaluation period (t2) covers the time interval from 2008 onwards including the year 2015. The data were analyzed and processed to density-equalizing maps using the NewQIS platform. A total number of 18,986 publications were identified in t1 that come from 85 countries. The US published the highest number of publications (n = 7,290), followed by the UK, Germany, Japan and France. In t2 19,676 items could be found worked out by 130 countries. The raking started just the same with the USA as most publishing nation with 7,127 publications on PH, followed by the UK and Germany. Japan fell back on 6th place, whereas China came into view on the 5th position. Analyzing the average citation rate as a parameter for research quality, Mexico reached the highest value in t1 and Ireland in t2. While, the country specific h-index underlined the leading position of the US research in both evaluation periods again. The average number of international collaboration items was expanding from none in 1978 to 530 items in 2015 with the USA as the country with the highest number of collaboration articles. The present study is the first large scale density-equalizing mapping and scientometric analysis of global PH research activity. Our data draw a sketch of the global research architecture in this field, indicating a need for specific research programs in countries with a lower human development index.

Global trends in research related to social media in psychology: mapping and bibliometric analysis

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Bibliometric analysis of a century of research on oral erythroplakia and leukoplakia

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“…The top ranking position of the US and the UK is not unique to OEL research and also visible in many other fields. 18,21,22 The leading position of India is less common but can be explained by the fact that oral cancer ranks among the top three types of cancer in the country, 23 accounting for over 30% of all cancers, 24 and thus, is a major problem health in the Indian subcontinent. 25 Unfortunately, research is not as active in some countries or populations despite a high incidence of oral cancer such as in continental Europe, Hong Kong, and Brazil and among African Americans in the United States.…”

“…We then evaluated the quality of a publishing journal or country by analyzing the number of citations of each item published. Moreover, for each journal and each country, we calculated a citation rate (cR) which is the sum of the total times cited divided by the total number of items published by the journal or country, as previously described . Of note, although the number of citations is an overall tool for assessing the relevance of a published item, it only indirectly infers its quality.…”

New quality and quantity indices in science (NewQIS): results of the first decade—project progress review

“…The distorted global landscape is usually characterized by a dominating USA and an enlarged European area as depicted in Fig. 3a for pulmonary hypertension research output (Gotting et al 2017). However, there are also research areas in which also countries from other continental regions appear enlarged.…”