Rahman M, Sakamoto J, Fukui T. "Japan's share of published research in opthalmology" JAPANESE JOURNAL OF OPHTHALMOLOGY 47 (2): 221-224 MAR-APR 2003

[Eugene Garfield]

Mahbubur RAHMAN : rahman at pbh.med.kyoto-u.ac.jp


TITLE     Japan's share of published research in ophthalmology

AUTHOR    Rahman M, Sakamoto J, Fukui T

JOURNAL   JAPANESE JOURNAL OF OPHTHALMOLOGY 47 (2): 221-224 MAR-APR 2003

Document type: Article     Language: English     Cited References: 5
Times Cited: 0

Abstract:
Purpose: This study was conducted to determine Japan's share of published
research in ophthalmology during the last decade.

Methods: Ophthalmology journals with higher impact factors were accessed
through the Medline database to elicit the number of articles published in
1991-2000 that originated in various countries, including Japan. The
proportion of articles with a higher grade of evidence (randomized
controlled trials/clinical trials, cohort studies, and case-control studies)
was determined for Japan and compared with the average values of the total
articles published in these journals. In addition, the percentage of
published research from the 20 top-ranking countries was calculated, showing
the trend over time.


Results: Of the total articles (21,327), Japan's share in the selected
ophthalmology journals was 6.5% (1,387 articles), ranking third in the
world, following the USA (51.5%) and the UK (11.3%). The recent increase in
the share was statistically significant for Japan (P=.01). However, the
proportionate value of clinical research evidence was lower for
Japan-originated articles than the average value for the total clinical
research articles in these journals.


Conclusions: Appropriate measures should be taken in the ophthalmology field
in Japan to increase the number of clinical research papers with a higher
grade of evidence.


Author Keywords:
grade of evidence, impact factor, Medline, published ophthalmology research

Addresses:
Rahman M, Kyoto Univ, Dept Epidemiol & Clin Res Informat Management, Grad
Sch Publ Hlth, Sakyo Ku, 54 Kawahara Cho, Kyoto 6068507, Japan
Kyoto Univ, Dept Epidemiol & Clin Res Informat Management, Grad Sch Publ
Hlth, Sakyo Ku, Kyoto 6068507, Japan
Kyoto Univ, Dept Gen Med & Clin Epidemiol, Grad Sch Med, Kyoto, Japan

Publisher:
ELSEVIER SCIENCE INC, NEW YORK

IDS Number:
665PX

ISSN:
0021-5155

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 Cited Author            Cited Work                Volume      Page   Year
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 DEJONG JW             EUR HEART J                   17        35      1996
 FUKUI T               INTERNAL MED                  41       626      2002
 GAGNON RE             CAN MED ASSOC J              162        37      2000
 RAHMAN M              J EPIDEMIOL                   11        46      2001
 RAHMAN M              NEW ENGL J MED               347      1211      2002