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Objective To explore the distribution and research status of literatures on Alzheimer disease (AD) published recently,to compare the differences in the research papers on AD between China and foreign countries,and to provide bibliometrics data for Alzheimer disease research.Methods Using bibliometrics methods,the characteristics and contents of Alzheimer disease research documents were analyzed in Pubmed database and Wanfang web by analysis tools.Research status of Alzheimer disease including the type of literatures and journal distribution from 2008 to 2012 was analyzed.Currently hot topics or top high frequency words were emphatically analyzed.Results There were 646 matched literatures for Alzheimer disease retrieved in Chinese core periodicals,and 19 423 literatures in Pubmed database.The articles for clinical study of Alzheimer disease were more than experimental and epidemiologic study among the 646 literatures.The disciplines distribution of AD in Chinese core journals was similar to international journals,mainly including nerves,brain,and geriatrics journals.The domestic research papers on Alzheimer disease were less than 5％ in Pubmed database,and the articles from Chinese journals in Chinese or English edition accounted for only a small proportion of Pubmed database.The recent research direction of Alzheimer disease in China was similar to foreign countries such as amyloid proteins,diagnosis and gene,but foreign research paid more attention to the metabolism,image and the aging mechanism in AD,while in China there were quite a lot of reports in the literatures on cholinergic drugs,tau protein,hippocampus and Chinese herbal treatments.Conclusions The AD-related disciplines distribution in China and foreign country is relatively fixed in recent 5 years.The AD researches carried out in China are close to those in foreign country,but researches on some areas still lag behind.The experimental and epidemiologic study on AD should be strengthen in China.

Objective To analyze the articles published in Chinese Journal of Geriatrics from 2008 to 2012 so as to understand the characteristics of published papers and research progress in geriatric medicine.Methods Based on Wanfang database,bibliometric analysis was conducted to analyze the quantity,types,authors,affiliations,fund support of all the articles published from 2008 to 2012 in Chinese Journal of Geriatrics.Results A total of 1567 papers were published in the journal from 2008 to 2012.The column with the most published papers was clinical research (1008 papers,64.3 ％),followed by experimental researches,reviews and lectures,investigations etc.The discipline with the most articles published in the journal was cardiovascular medicine,followed by surgery,neurology; respiratory etc.1356 authors from 506 affiliations published paper as the first author in the journal during this five years,with the maximal number being 7 papers and the major affiliation being affiliated hospitals of medical colleges (733 papers,49.3 ％).Authors from Beijing,Zhejiang,Jiangsu,Shanghai published more papers than those from other provinces.29.0％ (455papers) of the total papers were supported by fund,among which the majority was provincial fund,followed by national fund,municipal fund,ministry fund and military fund.Conclusions A relatively stable core author group has formed for Chinese Journal of Geriatrics,and the articles are of high quality.Chinese Journal of Geriatrics is one of the highest academic journals in geriatric medicine.

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Objective To analyze the literature distribution and research status of osteoporosis in the elderly published in Chinese Medical Association journals.Methods The literatures of elderly osteoporosis published in Chinese Medical Association journals from 2008 to 2013 were collected.And the publication year,distribution,content,institution and region of the literatures were analyzed.Results From 2008 to 2013,there were 76 articles about osteoporosis in the elderly published in 22 kinds of journals of the Chinese Medical Association.Among these journals,the Chinese Journal of Geriatrics-published elderly osteoporosis articles occupied the most number [28 (36.8％)].There were 21 articles published mostly in 2013 (27.6％),secondly in 2009 (17 articles,22.4％) and 2012 (12 articles,15.8％).The province or city that published more than 10 articles was Beijing (18 articles,23.7％),Zhejiang (13 articles,17.1％),Shanghai (10 articles,13.2％) and Guangdong (10 articles,13.2％).The institution that published most articles was Beijing Jishuitan Hospital (4articles,5.3％).The main contents of these literatures included the influencing factors,diagnosis,treatment strategy,bone metabolism and surgery treatment for elderly osteoporosis.Conclusions Chinese Medical Association journals are the important source to acquire osteoporosis literature for the medical workers.The distribution of journal is relatively concentrated,but the distribution of authors,institution is dispersed.Chinese Journal of Geriatrics publishes the most number of articles.The research of osteoporosis has attracted more attention.

Objective To study the literatures distribution and research status of the elderly tuberculosis published in the Chinese Medical Association Journals (CMAJ) from 2004-2013 in order to provide literature methodological data for the tuberculosis research.Methods The literatures on the elderly tuberculosis published in 82 kinds of CMAJs from 2004-2013 were classified and analyzed.The publication year,distribution,content,author,institution and region of these literatures were analyzed.Results There were 66 articles about the elderly tuberculosis published in 20 kinds of the Chinese Medical Association Journals.These literatures were published mostly in 2011 (16 articles,24.2％),secondly in 2012 (13 articles,19.6％) and 2010 (7 articles,10.6％),which were published mostly in Chinese Journal of Geriatrics (15 articles,22.7％).The main contents included clinical diagnosis and treatment,epidemiological investigation and drug research.The most published form was treatise (55 articles,83.3 ％).Most of the articles involved in pulmonary tuberculosis (34 articles,51.6 ％).The provinces or cities in which the most articles were published were Beijing (28 articles,42.4％) and Shandong (6 articles,9.1％).There was significantly difference in the article number between 2004-2008 and 2009-2013 (P＜ 0.05).The epidemiology,drug resistance mechanism,influencing factors,clinical characteristics,diagnosis and treatment strategy of the elderly tuberculosis,especially diagnosis and treatment development were well discussed in these literatures.Conclusions The literatures of the elderly tuberculosis published in Chinese Medical Association Journals are insufficient in quantity,with number increases of articles significantly over the past 5 years.Projects supported by the foundation is less and discipline construction should be strengthened.The distributions of authors and the primary population of tuberculosis are different,and early diagnosis and treatment of pulmonary tuberculosis in the elderly are concerned especially.

Objective To analyze the citation characteristics of literatures in Chinese Journal of Geriatrics published from 2008 to 2012.Methods According to the information from Wanfang database,articles in Chinese Journal of Geriatrics published from 2008 to 2012 were surveyed.The quantity,type of languages and the self-cited rate,etc were analyzed,and the Price's index,half life of literatures were calculated.Results Of the 1567 papers published in the journal from 2008 to 2012,1479 papers cited 16054 literatures,with a citation rate of 94.4％.The average number of citations in each paper was 10.25.The major language of citation was English (73.33％),followed by Chinese (26.67％),and only one citation was in Japanese.The self cited rates of author and periodical were 1.20％ and 5.23％,respectively.The Price's index was 45.71％ and the half-life of literatures was 4.27 years.Conclusions The authors of Chinese Journal of Geriatrics cite a wide range of literature,and the journal plays an important role in publicizing research achievements of geriatric medicine.However,the average number of citations in each paper,timeliness and novelty of cited literatures,diversity of citation languages need further improving.

Objective To investigate the characteristics of the author groups in 《Chinese Journal of Geriatrics》,in order to provide references for the future construction and development of the author ranks.Methods Bibliometric method was used to analyze the quantity of papers,region distributions,core authors and cooperative rate in 《Chinese Journal of Geriatrics》 from 2009 to 2013.Results The total amount of papers published in 《Chinese Journal of Geriatrics》》 from 2009 to 2013 was 1636,involving 31 provinces,autonomous regions,municipalities and administrative region.Among these,Beijing,Zhejiang,Tianjin and Jiangsu were the 3 top contributing regions,accounting for 54.0 percent (884/1636 papers).The 1636 papers were contributed by 1435 authors (first authors),of whom 1275 authors published only one paper,accounting for 87.7％ (1275/1435),and their papers accounted for 77.9％ of the total published papers (1275 /1636).27 authors had high yield of 3 or more papers published and deep influence,and they published 95 papers (5.8％).The degree of cooperation was 4.6 (7599 /1636),and the cooperation rate was 93.8％ (1534/1636) within the five years.Conclusions 《Chinese Journal of Geriatrics》is quite influential and attractive in the fields of geriatrics,and a good cooperative relationship is displayed between different authors and authors' institutions.