Annals of Nuclear Medicine

, Volume 16, Issue 6, pp 383–385 | Cite as

Japan's contribution to nuclear medical research

  • Mahbubur Rahman
  • Junichi Sakamoto
  • Tsuguya Fukui
Original Articles


We investigated the degree of Japan's contribution to the nuclear medical research in the last decade. Articles published in 1991–2000 in highly reputed nuclear medical journals were accessed through the MEDLINE database. The number of articles having affiliation with a Japanese institution was counted along with publication year. In addition, shares of top-ranking countries were determined along with their trends over time.

Of the total number of articles (7,788), Japan's share of articles in selected nuclear medical journals was 11.4% (889 articles) and ranked 2nd in the world after the USA (2,645 articles). The recent increase in the share was statistically significant for Japan (p=0.02, test for trend). Japan's share in nuclear medical research output is much higher than that in other biomedical fields.

Key words

MEDLINE nuclear medicine share of articles research productivity 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Fukui T. Procedure in evidence-based medicine.J Jpn Soc Intern Med 1998; 87: 2122–2134. (in Japanese)Google Scholar
  2. 2.
    Fukui T, Rahman M. Contribution of research in basic and clinical science in Japan.Intern Med 2002; 41: 626–628.PubMedCrossRefGoogle Scholar
  3. 3.
    Rahman M, Fukui T. A decline in American's share of research articles.New Engl J Med 2002. (in press)Google Scholar
  4. 4.
    ISI Journal Citation Reports. Institute for Scientific Information, 2000.Google Scholar
  5. 5.
    STATA Statistical software version 7 (intercooled). STATA Corporation, College Road, Texas, USA.Google Scholar
  6. 6.
    Rahman M, Sekimoto M, Morimoto T, Fukui T. Randomized controlled trials conducted in Japan as a comparison with top-ranking countries.J Epidemiol 2001; 11: 46–47.PubMedGoogle Scholar
  7. 7.
    de Jong JW, Schaper W. The international rank order of clinical cardiology.Eur Heart J 1996; 17: 35–42.PubMedGoogle Scholar
  8. 8.
    Gagnon RE, Macnab AJ, Gagnon FA. A quantitative ranking of Canada's research output of original human studies for the decade 1989 to 1998.CMAJ 2000; 162: 37–40.PubMedGoogle Scholar

Copyright information

© Springer 2002

Authors and Affiliations

  • Mahbubur Rahman
    • 2
  • Junichi Sakamoto
    • 2
  • Tsuguya Fukui
    • 1
  1. 1.Department of General Medicine and Clinical EpidemiologyKyoto University Graduate School of MedicineKyotoJapan
  2. 2.Department of Epidemiological and Clinical Research Information ManagementKyoto University Graduate School of Public HealthKyotoJapan

Personalised recommendations