[An analysis of impact factor of Chinese Journal of Internal Medicine from 2008 to 2010].

OBJECTIVE: To analyze the articles and citation published in the Chinese Journal of Internal Medicine from 2008 to 2010, in order to investigate the influence factors of impact factor (IF). METHODS: All articles published in the Chinese Journal of Internal Medicine covered by Chinese Medical Citation Index(CMCI) from 2008 to 2010 were searched and downloaded. Some article related attributions were manual added and their influences to IF were analyzed. RESULTS: A total of 1164 academic papers were published in the journal in 3 years, with 9.95 references per paper. The total citation was 1029 times, with 0.93 time per paper and 0.31 time per page. Among them, 736 articles were not cited, accounting for 63.2%. Original articles, pure clinical articles had good citation output. For fund supporting, the citation of articles without fund was higher than those with fund. The articles on hematology, cardiology and gastroenterology accounted the most, while ICU, emergency and nephrology were the least internal medicine reported specialties. Although there exists citation difference among different subjects, for considering the absolute values, neurology/psychiatry (0.73 time per paper), cardiology (0.65 time per paper) and gastroenterology (0. 54 time per paper) had better citation output, while hematology, basic research and rheumatology had no good performance to IF. CONCLUSION: We should further strengthen acquisition and dissemination of excellent articles, reduce the number of non-cited paper, expand periodical visibility, and provide a quick and convenient way of literature reading.

[The citation analysis of Chinese Journal of Internal Medicine from 2005 to 2011].

OBJECTIVE: To evaluate the academic level of Chinese Journal of Internal Medicine by analyzing its citation status by using bibliometrics method. METHODS: The distribution of articles published in Chinese Journal of Internal Medicine from January, 2005 to December, 2011 indexed by Chinese Science Citation Database (CSCD) was analyzed. RESULTS: A total of 2809 articles were published in Chinese Journal of Internal Medicine between January,2005 and December, 2011. Among them, 832(29.62%) articles were cited for totally 1993 times. There were 14 authors whose total citation number in 2005-2011 was > or = 10 times. Authors of the cited articles came from 25 provinces, autonomous regions and municipalities. The regions from where the articles had the highest citation were Beijing (341 articles), Shanghai (87 articles), Guangdong (64 articles), Jiangsu (45 articles) and Zhejiang (43 articles). The medical institutions with the highest citation were Peking Union Medical College Hospital of Peking Union Medical College and Chinese Academy of Medical Sciences (205 times), Peking University People's Hospital (77 times), and Chinese PLA General Hospital (76 times). CONCLUSIONS: Quite a few high level academic papers had been published in Chinese Journal of Internal Medicine in recent years. Chinese Journal of Internal Medicine plays a good role in enhancing academic exchange.

[Citation analysis of part of features in the Chinese Journal of Internal Medicine and other 3 foreign journals].

OBJECTIVE: To analysis the discrepancy of citations in different features of the Chinese Journal of Internal Medicine (Chin J Intern Med) and other 3 foreign journals (BMJ, JAMA, Ann Intern Med). METHODS: Citations of articles published from 1998 to 2002 in major features of the four journals were calculated. RESULTS: In the 5 years, the average number of citation original articles in Chin J Intern Med was 6.55, in BMJ 15.78, in JAMA 34.73 and Ann Intern Med 30.37; that of commentary articles was 3.82, 9.26, 18.38 and 13.79, respectively. In the recent five years, 86% citations were devoted to English language articles, 14% Chinese language articles, less than 1% Japanese articles, few other language articles. Price index analysis indicated the value for BMJ, JAMA, Ann Intern Med and Chin J Intern Med was 0.58, 0.57, 0.42 and 0.50, respectively. CONCLUSIONS: The discrepancy in average number of citation articles in different features of the four journals is not significantly different, even in time of their citation. The citation of articles is not varied in languages in Chin J Intern Med.