A quantitative and qualitative evaluation of reports of clinical trials published in six Brazilian dental journals indexed in the Scientific Electronic Library Online (SciELO)
Identifieur interne : 003015 ( Pmc/Curation ); précédent : 003014; suivant : 003016A quantitative and qualitative evaluation of reports of clinical trials published in six Brazilian dental journals indexed in the Scientific Electronic Library Online (SciELO)
Auteurs : Raphael Freitas De Souza [Canada] ; Carolina De Andrade Lima Chaves [Brésil] ; Carolina De Andrade Lima Chaves [Brésil] ; Carolina De Andrade Lima Chaves [Brésil] ; Mona Nasser [Allemagne] ; Zbys Fedorowicz [Bahreïn]Source :
- Journal of Applied Oral Science [ 1678-7757 ] ; 2010.
Abstract
Open access publishing is becoming increasingly popular within the biomedical sciences. SciELO, the Scientific Electronic Library Online, is a digital library covering a selected collection of Brazilian scientific journals many of which provide open access to full-text articles. This library includes a number of dental journals some of which may include reports of clinical trials in English, Portuguese and/or Spanish. Thus, SciELO could play an important role as a source of evidence for dental healthcare interventions especially if it yields a sizeable number of high quality reports.
The aim of this study was to identify reports of clinical trials by handsearching of dental journals that are accessible through SciELO, and to assess the overall quality of these reports.
Electronic versions of six Brazilian dental Journals indexed in SciELO were
handsearched at
The search retrieved 33 CCTs and 43 RCTs. A majority of the reports provided no description of either the method of randomization (75.3%) or concealment of the allocation sequence (84.2%). Participants and outcome assessors were reported as blinded in only 31.2% of the reports. Withdrawals and losses were only clearly described in 6.5% of the reports and none mentioned an intention-totreat analysis or any similar procedure.
The results of this study indicate that a substantial number of reports of trials and systematic reviews are available in the dental journals listed in SciELO, and that these could provide valuable evidence for clinical decision making. However, it is clear that the quality of a number of these reports is of some concern and that improvement in the conduct and reporting of these trials could be achieved if authors adhered to internationally accepted guidelines, e.g. the CONSORT statement.
Url:
DOI: 10.1590/S1678-77572010000200002
PubMed: 20485919
PubMed Central: 5349744
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">A quantitative and qualitative evaluation of reports of clinical trials
published in six Brazilian dental journals indexed in the Scientific Electronic
Library Online (SciELO)</title>
<author><name sortKey="De Souza, Raphael Freitas" sort="De Souza, Raphael Freitas" uniqKey="De Souza R" first="Raphael Freitas" last="De Souza">Raphael Freitas De Souza</name>
<affiliation wicri:level="1"><nlm:aff id="aff01"> DDS, PhD, Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, SP, Brazil, and Visiting Professor, Faculty of Dentistry, McGill University, Montréal, QC, Canada.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Canada</country>
<wicri:regionArea> DDS, PhD, Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, SP, Brazil, and Visiting Professor, Faculty of Dentistry, McGill University, Montréal, QC</wicri:regionArea>
</affiliation>
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<author><name sortKey="Chaves, Carolina De Andrade Lima" sort="Chaves, Carolina De Andrade Lima" uniqKey="Chaves C" first="Carolina De Andrade Lima" last="Chaves">Carolina De Andrade Lima Chaves</name>
<affiliation wicri:level="1"><nlm:aff id="aff02"> DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP, Brazil.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Brésil</country>
<wicri:regionArea> DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP</wicri:regionArea>
</affiliation>
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<author><name sortKey="Chaves, Carolina De Andrade Lima" sort="Chaves, Carolina De Andrade Lima" uniqKey="Chaves C" first="Carolina De Andrade Lima" last="Chaves">Carolina De Andrade Lima Chaves</name>
<affiliation wicri:level="1"><nlm:aff id="aff02"> DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP, Brazil.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Brésil</country>
<wicri:regionArea> DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Chaves, Carolina De Andrade Lima" sort="Chaves, Carolina De Andrade Lima" uniqKey="Chaves C" first="Carolina De Andrade Lima" last="Chaves">Carolina De Andrade Lima Chaves</name>
<affiliation wicri:level="1"><nlm:aff id="aff02"> DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP, Brazil.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Brésil</country>
<wicri:regionArea> DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP</wicri:regionArea>
</affiliation>
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<author><name sortKey="Nasser, Mona" sort="Nasser, Mona" uniqKey="Nasser M" first="Mona" last="Nasser">Mona Nasser</name>
<affiliation wicri:level="1"><nlm:aff id="aff03"> DDS, Researcher, Department of Health Information, Institute for Quality and Efficiency in Health Care, Cologne, Germany.</nlm:aff>
<country xml:lang="fr" wicri:curation="lc">Allemagne</country>
<wicri:regionArea> DDS, Researcher, Department of Health Information, Institute for Quality and Efficiency in Health Care, Cologne</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Fedorowicz, Zbys" sort="Fedorowicz, Zbys" uniqKey="Fedorowicz Z" first="Zbys" last="Fedorowicz">Zbys Fedorowicz</name>
<affiliation wicri:level="1"><nlm:aff id="aff04"> MSc DPH, BDS, LDS RCS (Eng), Director, The Bahrain Branch of the UK Cochrane Centre, The Cochrane Collaboration, Awali, Bahrain.</nlm:aff>
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<wicri:regionArea> MSc DPH, BDS, LDS RCS (Eng), Director, The Bahrain Branch of the UK Cochrane Centre, The Cochrane Collaboration, Awali</wicri:regionArea>
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<series><title level="j">Journal of Applied Oral Science</title>
<idno type="ISSN">1678-7757</idno>
<idno type="eISSN">1678-7765</idno>
<imprint><date when="2010">2010</date>
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<front><div type="abstract" xml:lang="en"><p>Open access publishing is becoming increasingly popular within the biomedical
sciences. SciELO, the Scientific Electronic Library Online, is a digital library
covering a selected collection of Brazilian scientific journals many of which provide
open access to full-text articles. This library includes a number of dental journals
some of which may include reports of clinical trials in English, Portuguese and/or
Spanish. Thus, SciELO could play an important role as a source of evidence for dental
healthcare interventions especially if it yields a sizeable number of high quality
reports.</p>
<sec><title>Objective</title>
<p>The aim of this study was to identify reports of clinical trials by handsearching
of dental journals that are accessible through SciELO, and to assess the overall
quality of these reports.</p>
</sec>
<sec><title>Material and methods</title>
<p>Electronic versions of six Brazilian dental Journals indexed in SciELO were
handsearched at <ext-link ext-link-type="uri" xlink:href="www.scielo.br">www.scielo.br</ext-link>
in September 2008. Reports of clinical trials were
identified and classified as controlled clinical trials (CCTs - prospective,
experimental studies comparing 2 or more healthcare interventions in human beings)
or randomized controlled trials (RCTs - a random allocation method is clearly
reported), according to Cochrane eligibility criteria. Criteria to assess
methodological quality included: method of randomization, concealment of treatment
allocation, blinded outcome assessment, handling of withdrawals and losses and
whether an intention-totreat analysis had been carried out.</p>
</sec>
<sec><title>Results</title>
<p>The search retrieved 33 CCTs and 43 RCTs. A majority of the reports provided no
description of either the method of randomization (75.3%) or concealment of the
allocation sequence (84.2%). Participants and outcome assessors were reported as
blinded in only 31.2% of the reports. Withdrawals and losses were only clearly
described in 6.5% of the reports and none mentioned an intention-totreat analysis
or any similar procedure.</p>
</sec>
<sec><title>Conclusions</title>
<p>The results of this study indicate that a substantial number of reports of trials
and systematic reviews are available in the dental journals listed in SciELO, and
that these could provide valuable evidence for clinical decision making. However,
it is clear that the quality of a number of these reports is of some concern and
that improvement in the conduct and reporting of these trials could be achieved if
authors adhered to internationally accepted guidelines, e.g. the CONSORT
statement.</p>
</sec>
</div>
</front>
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<pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Appl Oral Sci</journal-id>
<journal-id journal-id-type="iso-abbrev">J Appl Oral Sci</journal-id>
<journal-title-group><journal-title>Journal of Applied Oral Science</journal-title>
</journal-title-group>
<issn pub-type="ppub">1678-7757</issn>
<issn pub-type="epub">1678-7765</issn>
<publisher><publisher-name>Faculdade de Odontologia de Bauru da Universidade de São
Paulo</publisher-name>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">20485919</article-id>
<article-id pub-id-type="pmc">5349744</article-id>
<article-id pub-id-type="doi">10.1590/S1678-77572010000200002</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Systematic Review</subject>
</subj-group>
</article-categories>
<title-group><article-title>A quantitative and qualitative evaluation of reports of clinical trials
published in six Brazilian dental journals indexed in the Scientific Electronic
Library Online (SciELO)</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>de SOUZA</surname>
<given-names>Raphael Freitas</given-names>
</name>
<xref ref-type="aff" rid="aff01">1</xref>
<xref ref-type="corresp" rid="c01"></xref>
</contrib>
<contrib contrib-type="author"><name><surname>CHAVES</surname>
<given-names>Carolina de Andrade Lima</given-names>
</name>
<xref ref-type="aff" rid="aff02">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>CHAVES</surname>
<given-names>Carolina de Andrade Lima</given-names>
</name>
<xref ref-type="aff" rid="aff02">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>CHAVES</surname>
<given-names>Carolina de Andrade Lima</given-names>
</name>
<xref ref-type="aff" rid="aff02">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>NASSER</surname>
<given-names>Mona</given-names>
</name>
<xref ref-type="aff" rid="aff03">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>FEDOROWICZ</surname>
<given-names>Zbys</given-names>
</name>
<xref ref-type="aff" rid="aff04">4</xref>
</contrib>
</contrib-group>
<aff id="aff01"><label>1</label>
DDS, PhD, Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, SP, Brazil, and Visiting Professor, Faculty of Dentistry, McGill University, Montréal, QC, Canada.</aff>
<aff id="aff02"><label>2</label>
DDS, PhD student, Department of Dental Materials and Prosthodontics, Araraquara Dental School, São Paulo State University, Araraquara, SP, Brazil.</aff>
<aff id="aff03"><label>3</label>
DDS, Researcher, Department of Health Information, Institute for Quality and Efficiency in Health Care, Cologne, Germany.</aff>
<aff id="aff04"><label>4</label>
MSc DPH, BDS, LDS RCS (Eng), Director, The Bahrain Branch of the UK Cochrane Centre, The Cochrane Collaboration, Awali, Bahrain.</aff>
<author-notes><corresp id="c01"><bold>Corresponding address:</bold>
Raphael Freitas de Souza -
Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto -
Av. do Café, s/n 14 040-050, Ribeirão Preto, SP, Brazil - Phone:
55-14-3603-4006 - e-mail: <email>raphael@forp.usp.br</email>
</corresp>
</author-notes>
<pub-date pub-type="epub-ppub"><season>Mar-Apr</season>
<year>2010</year>
</pub-date>
<pmc-comment>Fake ppub date generated by PMC from publisher
pub-date/@pub-type='epub-ppub' </pmc-comment>
<pub-date pub-type="ppub"><season>Mar-Apr</season>
<year>2010</year>
</pub-date>
<volume>18</volume>
<issue>2</issue>
<fpage>104</fpage>
<lpage>109</lpage>
<history><date date-type="received"><day>22</day>
<month>12</month>
<year>2008</year>
</date>
<date date-type="accepted"><day>16</day>
<month>9</month>
<year>2009</year>
</date>
</history>
<permissions><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an Open Access article distributed under the terms of the Creative
Commons Attribution License, which permits unrestricted use, distribution, and
reproduction in any medium, provided the original work is properly
cited.</license-p>
</license>
</permissions>
<abstract><p>Open access publishing is becoming increasingly popular within the biomedical
sciences. SciELO, the Scientific Electronic Library Online, is a digital library
covering a selected collection of Brazilian scientific journals many of which provide
open access to full-text articles. This library includes a number of dental journals
some of which may include reports of clinical trials in English, Portuguese and/or
Spanish. Thus, SciELO could play an important role as a source of evidence for dental
healthcare interventions especially if it yields a sizeable number of high quality
reports.</p>
<sec><title>Objective</title>
<p>The aim of this study was to identify reports of clinical trials by handsearching
of dental journals that are accessible through SciELO, and to assess the overall
quality of these reports.</p>
</sec>
<sec><title>Material and methods</title>
<p>Electronic versions of six Brazilian dental Journals indexed in SciELO were
handsearched at <ext-link ext-link-type="uri" xlink:href="www.scielo.br">www.scielo.br</ext-link>
in September 2008. Reports of clinical trials were
identified and classified as controlled clinical trials (CCTs - prospective,
experimental studies comparing 2 or more healthcare interventions in human beings)
or randomized controlled trials (RCTs - a random allocation method is clearly
reported), according to Cochrane eligibility criteria. Criteria to assess
methodological quality included: method of randomization, concealment of treatment
allocation, blinded outcome assessment, handling of withdrawals and losses and
whether an intention-totreat analysis had been carried out.</p>
</sec>
<sec><title>Results</title>
<p>The search retrieved 33 CCTs and 43 RCTs. A majority of the reports provided no
description of either the method of randomization (75.3%) or concealment of the
allocation sequence (84.2%). Participants and outcome assessors were reported as
blinded in only 31.2% of the reports. Withdrawals and losses were only clearly
described in 6.5% of the reports and none mentioned an intention-totreat analysis
or any similar procedure.</p>
</sec>
<sec><title>Conclusions</title>
<p>The results of this study indicate that a substantial number of reports of trials
and systematic reviews are available in the dental journals listed in SciELO, and
that these could provide valuable evidence for clinical decision making. However,
it is clear that the quality of a number of these reports is of some concern and
that improvement in the conduct and reporting of these trials could be achieved if
authors adhered to internationally accepted guidelines, e.g. the CONSORT
statement.</p>
</sec>
</abstract>
<kwd-group><kwd>Clinical trials as topic</kwd>
<kwd>Randomized controlled trials as topic</kwd>
<kwd>Evidence-based medicine</kwd>
<kwd>Bias</kwd>
<kwd>Journalism, dental</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
</record>
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