Consolidated Standards of Reporting Trials

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CONSORT (Consolidated Standards Of Reporting Trials) encompasses various initiatives developed by the CONSORT Group to alleviate the problems arising from inadequate reporting of randomized controlled trials.

Contents

[edit] The CONSORT Statement

The main product of the CONSORT Group is the CONSORT Statement,[1] which is an evidence-based, minimum set of recommendations for reporting randomized trials. It offers a standard way for authors to prepare reports of trial findings, facilitating their complete and transparent reporting, reducing the influence of bias on their results, and aiding their critical appraisal and interpretation.

The CONSORT Statement comprises a 22-item checklist and a flow diagram, along with some brief descriptive text. The checklist items focus on reporting how the trial was designed, analyzed, and interpreted; the flow diagram displays the progress of all participants through the trial. The Statement has been translated into several languages.

The CONSORT ‘Explanation and Elaboration’ document[2] explains and illustrates the principles underlying the CONSORT Statement. It is strongly recommended that it is used in conjunction with the CONSORT Statement.[1]

Considered an evolving document, the CONSORT Statement is subject to periodic changes as new evidence emerges. The CONSORT website, http://www.consort-statement.org, contains the current definitive version of the CONSORT Statement and up-to-date information on extensions.

[edit] Extensions of the CONSORT Statement

The main CONSORT Statement is based on the 'standard' two-group parallel design. Extensions of the CONSORT Statement have been developed to give additional guidance for randomized trials with specific designs (e.g., cluster randomized trials,[3] noninferiority and equivalence trials[4]), data (e.g., harms,[5] abstracts[6]), and interventions (e.g., herbals medicinal intervention trials,[7] non-pharmacologic treatment interventions[8]). This list is, by no means, exhaustive and work is ongoing.

[edit] History

In 1993, 30 experts - medical journal editors, clinical trialists, epidemiologists, and methodologists - met in Ottawa, Canada to discuss ways of improving the reporting of randomized trials. This meeting resulted in the Standardized Reporting of Trials (SORT) statement,[9] a 32-item checklist and flow diagram in which investigators were encouraged to report on how randomized trials were conducted.

Concurrently, and independently, another group of experts, the Asilomar Working Group on Recommendations for Reporting of Clinical Trials in the Biomedical Literature, convened in California, USA, and were working on a similar mandate. This group also published recommendations for authors reporting randomized trials.[10]

At the suggestion of Dr. Drummond Rennie, from JAMA,[11] in 1995 representatives from both these groups met in Chicago, USA, with the aim of merging the best of the SORT and Asilomar proposals into a single, coherent evidence-based recommendation. This resulted in the Consolidated Standards of Reporting Trials (CONSORT) Statement, which was first published in 1996.[12] Further meetings of the Group in 1999 and 2000 led to the publication of the revised CONSORT Statement in 2001.[1] Following a meeting in January 2007, a further revision is underway.

[edit] Impact

The CONSORT Statement has gained considerable support since its inception in 1996, over 200 journals and editorial groups worldwide now endorse it, including The Lancet, BMJ, JAMA, New England Journal of Medicine, World Association of Medical Editors, and International Committee of Medical Journal Editors. The 2001 revised Statement has been cited over 1,200 times and the accompanying explanatory document over 500 times. Another indication of CONSORT’s impact is reflected in the approximately 40,000 hits per month that the CONSORT website has received. It has also recently been published as a book for those involved in the planning, conducting and interpretation of clinical trials.[13]

Results from a recent systematic review suggest that use of the CONSORT checklist is associated with improved reporting of randomized trials.[14]

[edit] References

  1. ^ Moher D, Schulz KF, Altman DG. The CONSORT statement: revised recommendations for improving the quality of reports of parallel-group randomized trials . Ann Intern Med 2001; 134(8):657-662. [1]
  2. ^ Altman DG, Schulz KF, Moher D, Egger M, Davidoff F, Elbourne D, Gotzsche PC, Lang T. The revised CONSORT statement for reporting randomized trials: explanation and elaboration. Ann Intern Med 2001; 134(8):663-694. [2]
  3. ^ Campbell MK, Elbourne DR, Altman DG. CONSORT statement: extension to cluster randomised trials. BMJ 2004; 328(7441):702-708. [3]
  4. ^ Piaggio G, Elbourne DR, Altman DG, Pocock SJ, Evans SJW. Reporting of noninferiority and equivalence randomized trials: An extension of the CONSORT statement. JAMA 2006; 295:1152-1160. [4]
  5. ^ Ioannidis JP, Evans SJ, Gotzsche PC, O'Neill RT, Altman DG, Schulz K, Moher D. Better reporting of harms in randomized trials: an extension of the CONSORT statement. Ann Intern Med 2004; 141(10):781-788. [5]
  6. ^ Hopewell S, Clarke M, Moher D, Wager E, Middleton P, Altman DG, Schulz KF and the CONSORT Group. CONSORT for reporting randomized controlled trials in journal and conference abstracts: explanation and elaboration. PLoS Med 2008 5(1): e20. [6]
  7. ^ Gagnier JJ, Boon H, Rochon P, Moher D, Barnes J, Bombardier C. Reporting randomized, controlled trials of herbal interventions: an elaborated CONSORT statement. Ann Intern Med 2006; 144(5):364-367. [7]
  8. ^ Boutron I, Moher D, Altman DG, Schulz K, Ravaud P, for the CONSORT Group. Extending the CONSORT Statement to randomized trials of nonpharmacologic treatment: explanation and elaboration. Ann Intern Med 2008: 148(4):295-309. [8]
  9. ^ The Standards of Reporting Trials Group. A proposal for structured reporting of randomized controlled trials. The Standards of Reporting Trials Group. JAMA. 1994; 272(24):1926-1931.
  10. ^ Working Group on Recommendations for Reporting of Clinical Trials in the Biomedical Literature. Call for comments on a proposal to improve reporting of clinical trials in the biomedical literature. Working Group on Recommendations for Reporting of Clinical Trials in the Biomedical Literature. Ann Intern Med. 1994; 121(11):894-895.
  11. ^ Rennie D. Reporting randomized controlled trials. An experiment and a call for responses from readers. JAMA 1995; 273(13):1054-1055.
  12. ^ Begg C, Cho M, Eastwood S, Horton R, Moher D, Olkin I, Pitkin R, Rennie D, Schulz KF, Simel D, Stroup DF. Improving the quality of reporting of randomized controlled trials: the CONSORT statement. JAMA 1996; 276(8):637-639.
  13. ^ Keech A, Gebski VJ, Pike R. Interpreting and reporting clinical trials. A guide to the CONSORT Statement and the principles of randomised controlled trials. 2007: Australasian Medical Publishing: NSW, Australia.
  14. ^ Plint AC, Moher D, Morrison A, Schulz K, Altman DG, Hill C, Gaboury I. Does the CONSORT checklist improve the quality of reports of randomised controlled trials? A systematic review. Med J Aust 2006; 185(5):263-267.

[edit] See also