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Revista Española de Salud Pública

versão On-line ISSN 2173-9110versão impressa ISSN 1135-5727

Rev. Esp. Salud Publica vol.88 no.2 Madrid Mar./Abr. 2014 



Declaration of transparency: promoting a more complete, honest and adequate publication of scientific articles

Declaración de trasparencia: promoviendo una publicación más completa, honesta y adecuada de los artículos cientítificos



Ferrán Catalá-López (1,2), Salvador Peiró (2,3), Brian Hutton (4,5), Cristina Pérez Andrés (6) and David Moher (4,5)

(1) Division of Pharmacoepidemiology and Pharmacovigilance. Spanish Medicines and Healthcare Products Agency (AEMPS.) Madrid. Spain.
(2) Foundation Institute for Health Services Research. Valencia. Spain.
(3) FISABIO-Public Health. Research Network for Health Services in Chronic Disease (REDISSEC). Valencia. Spain.
(4) Clinical Epidemiology Program. Ottawa Hospital Research Institute (OHRI). Ottawa. Ontario. Canadá.
(5) Faculty of Medicine. University of Ottawa. Ottawa. Ontario. Canada.
(6) Editorial Board of Revista Española de Salud Pública. Ministry of Health, Social Services and Equality. Madrid. Spain.

Funding: None.

The authors declare no conflicts of interest.

The views expressed in this article are those of the authors and do not necessarily reflect the views of the institutions in which they work.




Health research is fundamental for the improvement of population health. Research development should be a priority action in any health policy agenda1. Although scientific publication is not the last stage of a research process, as a rule, it should incorporate certain issues into the actual application of health care, it is in fact essential as it facilitates an open debate with the scientific community and, ultimately, with society in general. The outcome of any research may be communicated in various ways and formats (scientific meetings, reports, working papers, the Internet...). However, scientific articles usually offer the greatest rigour, dissemination and impact. A scientific publication of research findings should provide information about what was actually done and how, what was found and, basically, assess the reliability, validity and relevance of any conclusions reached further to tasks that may be of importance for decision-making in many different matters related to health care, public health and health policies.

The quality of scientific publications depends on an expert appraisal (about the object being studied and methodology used), carried out through a peer review process. Through this system, which is essential for quality control and the prominence of publications, one or more experts review, analyse and evaluate articles to determine their scientific rigour and relevance to their specific area of knowledge. Although this system is the most popular and is widely implemented (it is included in the recommendations for the conduct, reporting, edit and publication of scholarly work in medical journals, issued by the International Committee of Medical Journal Editors2) a peer review is not problem-free when subjected to a critical examination3-6.

There are many recommendations and initiatives that try to standardize reporting of essential issues related to scientific articles7-10. However, occasionally, some research descriptions remain vague and still lack important information, basically as regards methods and results11,12. There are numerous examples in the scientific literature13-19 of the serious defects existing in published scientific articles, to include omitted information on evaluated interventions, the criteria used to include/exclude samples, and a full description of both methodology (enabling the research to be reproduced) and results, amongst others. Other common problems are publication bias (non-communication of the study depending on the nature and magnitude of results) and selective reporting bias (selective revealing or suppression of information)19-23. If key aspects of the research methodology are omitted, any evaluation about the validity of the study's conclusions may be difficult or even impossible. Whenever key research aspects are unknown (due to non-reporting or a lack of clarity), the research is difficult to adequately interpret. Its conclusions are much more difficult to use and their implementation into decision-making is extraordinarily restricted.

An incomplete or defective dissemination of scientific knowledge is not acceptable, let alone in the current social and economic scenario, where health services are expected to do more with less11. Authors should provide key information so that, when reading an article, no presumptions (whether or not correct) are necessary on the methodology used. The persons in charge of reviewing and editing should also try to encourage and guarantee that the presentation is complete, accurate and clear, improving an adequate interpretation of any journal articles published.

Several resources exist to report scientific articles, such as reporting guidelines for research publication24, to include CONSORT (Consolidated Standards of Reporting Trials)8, STROBE (Strengthening the Reporting of Observational studies in Epidemiology)9 and PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses)10, which intend to assist authors when drafting their articles, including any other appraising individuals, thereby improving relevant aspects of published research works. In general, these guidelines use checklists to specify the minimum items required to present research information clearly and consistently. These checklists explicitly focus on study design and analysis, in addition to other aspects that may be used to evaluate the risk of bias and reporting any research. The total or partial adoption of these guidelines has already become an editorial requirement imposed by many international and national journals through their publication rules.

Making these reporting guidelines available or accessible for authors and reviewers can help remedy certain information defects in scientific articles.

Within the scope of research in health services and public health, and despite the existence of guidelines to practically publish any research design (including case descriptions25, clinical trials8, case-control studies, and cohort studies, systematic reviews and meta-analyses10 and cost-effectiveness analyses26), it is still relatively frequent to find inconsistencies or the absence of relevant information16-18,27-33. For example, various reviews conducted in different specialties have disclosed that very few publications of studies with case-control design explain the methods used to identify cases and controls, in addition to other limitations31-33. Other analysis conclude that epidemiological studies published in biomedical journals do not usually justify their selection of potential confounding factors29 or methods developed to control their effect30. Some systematic reviews have proven that the application of reporting guidelines, such as CONSORT, have helped increase the quality of information in articles using clinical trial designs, although evidence is less consistent in epidemiological studies that use observational designs35-37.

Of greater concern is inappropriate conduct or scientific fraud, i.e. the deliberate handling of information related to any stage of a research process, given that the number of articles retracted over the last few years has increased38-39. An exhaustive review conducted in PubMed/Medline, from 1975 to May 2012, covering 2,047 retracted biomedical research articles, disclosed that only 21% of these retractions were attributable to errors, whereas 67% were attributable to inappropriate conduct, including fraud or potential fraud (43%), duplicate publications (14%) and plagiarism (10%). Furthermore, the percentage of retracted articles on the grounds of fraud has multipled by ten over the last decades39.

The editors of various journals and editor associations have been claiming specific measures to prevent and detect inappropriate conduct in scientific research. However the content, visibility and access to these policies considerably differ40-42. Moreover, the absence of a common position in these situations, which affect various levels of shared responsibility amongst researchers, authors, institutions, reviewers, editors and editorial committees41, means that they are hardly effective.

Aware of the problem, some scientific journals are leading "preventive" pro-change initiatives. In August 2013 the British Medical Journal published the announcement made by its senior statistics editor and one of this editorial authors to encourage transparency, declaring a change in editorial management which, thereinafter, would include a "transparency declaration" from the author designated for correspondence (or article guarantor) upon delivery, when requesting a review for publication purposes43. Since then, various journals have become aware of the matter and/or have voiced this initiative44-46. However, as far as we know, no national or international journal in the field of epidemiology, public health and the health administration has responded to this announcement.

This was the case until today, because Revista Española de Salud Pública has already included in its publication rules47 the need to provide a "transparency declaration" when submitting papers eligible for publication in the journal. The lead author, guarantor or person in charge of content, declares that the manuscript submitted is a complete, honest, accurate and transparent manner of the study being reported, that no important aspects have been omitted and that any discrepancies from the study as planned have been in the manuscript.

With this step we would also like to encourage other national and international journals in any field, particularly related to public health, epidemiology, health promotion, environmental health, evaluation of health services, health economics and the health administration, to support this "transparency declaration" through the EQUATOR network - Enhancing the QUAlity and Transparency Of health Research48. For years, the EQUATOR network is collaborating towards improving the reliability and value of scientific literature, by promoting clear and precise practice for the publication of articles. In order to reach this objective, the network intends to encourage awareness about the importance of continuing with and promoting adequate practice for research communication, contributing to the development, dissemination and implementation of reporting guidelines for article publication, and to systematically evaluate the presentation quality of sientific articles. The publication of visible editorial policies, which are easily accessed and consistent, to fight inappropriate conduct, could prevent the publication of fraudulent articles, increase the number of retracted articles already published and, perhaps, reduce inapropriate conduct in scientific research41. Along these lines, the adoption of a "transparency declaration" by journals may amount to a complementary yet different measure from other widely accepted editorial rules, such as those that already handle ethics and data protection7, conflicts of interest49 or the adhesion to main reporting guidelines for the publication of research24. We hope that the application of this policy will represent a huge step forward to improve the quality of publications related to public health and health administration.



Ferrán Catalá-López
Division of Pharmacoepidemiology and Pharmacovigilance
Spanish Medicines and Healthcare Products Agency (AEMPS)
Parque Empresarial "Las Mercedes"
Building 8, 1st floor
Campezo, 1.
28022 Madrid, Spain




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