Study Objective: The development of emergency medicine originated from North America and the contributions from other area have increased in the past decade. Taiwan and China were the first and 6th contributors outside the United States that submitting manuscripts to the leading emergency medicine journals in 2010. The official journal of the Hong Kong College of Emergency Medicine was enrolled in the 2010 Journal Citation Reports. This study aims to evaluate the academic contribution from Taiwan, China and Hong Kong to emergency medicine field according to the scientific publication in emergency medicine journals. Methods: Design: This study was an observational study and it qualified for a waiver from our institutional review board because no human subjects were involved. Setting: All of the data were collected from the Journal Citation Reports and SciVerse Scopus database. Type of participants: All journals included in the category of emergency medicine in the 2010 Journal Citation Reports were enrolled as source journals. All of the articles published in these journals between 1992 and 2011 were included. For journals included in the Journal Citation Reports after 1992, articles published 3 years before the inclusion year of Journal Citation Reports were excluded. The in press or E-published articles were excluded. Data Collection: A computerized literature search was conducted in the SciVerse Scopus database on 17 March 2012. The International Standard Serial Number (ISSN) was used to perform search of articles published in emergency medicine journals between 1992 and 2011. The search terms used were “ISSN (xxxx-xxxx) AND PUBYEAR AFT 1991 AND PUBYEAR BEF 2012.” The articles originated from Taiwan, China, and Hong Kong were retrieved by added the limitations of “AND AFFILCOUNTRY (Taiwan),” “AND AFFILCOUNTRY (China),” “AND AFFILCOUNTRY (Hong Kong).” We collected data on articles including publication journal, publication year, cited times, and document type for further analyze. Data Analysis: Linear regression was used to evaluate the trends of article number from Taiwan, China, Hong Kong and the ratio to all emergency medicine articles. The slope (β) of the linear regression was adopted as representative of trends. The 95% confidence intervals (CIs) of β were calculated. The total cited times, average cited times, and document type were analyzed using descriptive statistics. ANOVA was used for detecting the difference among the average cited times of these 3 regions. A p-value of <0.05 was considered statistically significant. Results: The publication numbers of Taiwan, China, Hong Kong and all emergency medicine journals between 1992 and 2011 increased from 2 to 86, 1 to 59, 2 to 58, and 1008 to 42199, respectively. The trends of the numbers of publication from Taiwan, China, Hong Kong and the trends of the ratio to all emergency medicine publications from 1992 to 2011 were 6.195, 1.882, 2.835, 1.529×10-3, 4.576×10-4, and 6.798×10-4 respectively. All p-value were <0.001. The trends from 2002 to 2011 were 9.673, 5.952, 7.158, 1.113×10-3, 1.482×10-3, and 1.529×10-3, respectively. All p-value were significant except that of the ratio of Taiwan to all emergency medicine publications. The average cited times of publications from Taiwan, China and Hong Kong were 4.55, 2.66, 3.78 respectively (p = 0.01). The ratios of review and article to all document types of Taiwan, China and Hong Kong publications were 80.3%, 87.4%, and 77.8%. Conclusion: In the past 20 years, the contribution from Taiwan, China, and Hong Kong authors to emergency medicine journals has a substantial increase. The quantity and quality of articles from Taiwan is better than China and Hong Kong. The gap between Taiwan and both China and Hong Kong was diminishing in the past 10 years.
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