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Randomised controlled trials and publication trends in periodontal research during 1980–2000
Department of Health Sciences, Knstianstad University, Kristiadstad, Sweden.
Department of Health Sciences, Knstianstad University, Kristiadstad, Sweden.
2002 (English)In: Journal of Clinical Periodontology, ISSN 0303-6979, E-ISSN 1600-051X, Vol. 29, no 12, 1112-1117 p.Article in journal (Refereed) Published
Abstract [en]

Objectives:  To study publication trends, as well as the number and proportion of randomised controlled trials covering different areas of periodontal research (RCT-Ps).

Material and methods:  The study was based on Medline searches (MeSH terms) for the period 1980– 2000. The RCT-Ps (n = 675) were examined for relevance for different areas of periodontal research, journals of publication, and the countries of origin.

Results:  In periodontal research the annual number of publications had increased from 162 in 1980 to 440 in 2000. Moreover, clinical trials in periodontal research (CT-Ps) had increased more than 10-fold, and RCT-Ps more than 15-fold. More than 4 out of 10 RCT-Ps covered the areas ‘periodontal surgery’ and ‘gingivitis and plaque treatment or prevention’. More than 6 out of 10 RCT-Ps in total and more than 8 out of 10 RCT-Ps about ‘periodontal surgery’, were published in two different journals. U.S.A was the most common country of origin of RCT-Ps, contributing to almost 4 out of 10 RCT-Ps during 1988– 2000.

Conclusion:  The annual number of RCT-Ps increased substantially during 1980–2000, and a few clinical research areas predominated. Future research should give priority to areas where clinical evidence is scarce and where high-quality RCT-Ps are most needed.

Place, publisher, year, edition, pages
2002. Vol. 29, no 12, 1112-1117 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-84951DOI: 10.1034/j.1600-051X.2002.291211.xOAI: diva2:563134
Available from: 2012-10-29 Created: 2012-10-29 Last updated: 2012-10-29
In thesis
1. Randomised clinical trials and evidence-based general dentistry
Open this publication in new window or tab >>Randomised clinical trials and evidence-based general dentistry
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

A growing number of scientific publications and new treatment modalities have increased the difficulties of keeping up to date with the latest research evidence in clinical practice. Therefore, evidence-based dentistry and medicine (EBDM) has evolved as an attempt to summarise current best evidence.

The overall aim of this thesis was to study the availability and the methodological quality of randomised controlled trials (RCTs) in dental (RCT-Ds) and medical (RCT-Ms) research, and publications describing epidemiological registration methods of dental caries. It also examines the applicability of evidence-based methods to general dental practice.

The most important findings were that the armual number of publications in dental research showed a decreasing trend from 1969 to 1999, whereas medical research increased. The armual number of clinical trials (CTs), meta-analyses and RCTs increased, but represented just a fraction of all publications in both dental and medical research. Medical subject heading (MeSH) searches provided an overall adequate method for rapid location of RCT-Ds on Medline for most areas of dental research. The quality of RCT-Ds and RCT-Ms were generally inadequate. There was no correlation between the quality of RCTs and Journal Impact Factor. The armual number of publications, CTs and RCTs in periodontal research (RCT-Ps) increased during 1980-2000. A few clinical research areas dominated the RCT-Ps. Most of the RCT-Ps were published in just two different dental journals. Validation methodology in publications describing epidemiological methods for registering dental caries was inadequate according to EBDM recommendations and needs to be improved.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2004. 57 p.
Linköping University Medical Dissertations, ISSN 0345-0082 ; 865
Dental care, dental research, epidemiological methods, evidence-based medicine, Medline, randomized controlled trials, validity
National Category
Social Sciences
urn:nbn:se:liu:diva-22686 (URN)1978 (Local ID)91-7373-839-5 (ISBN)1978 (Archive number)1978 (OAI)
Public defence
2004-11-12, Aulan, Hälsans Hus, Hälsouniversitetet, Linköping, 13:00 (Swedish)
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2012-10-29Bibliographically approved

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Sjögren, Petteri
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