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
garfield at CODEX.CIS.UPENN.EDU
Fri Jun 27 15:00:51 EDT 2003
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
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