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All Trials Registered | All Results Reported

Peter Gill
Last edited 9th January 2013

“Thousands of clinical trials have not reported their results; some have not even been registered.” All trials registered | All results reported

This is a problem.

A petition was launched today that calls on governments, regulators, and research bodies to put measures in place to register and report the methods and results of clinical trials. This initiative, led by Bad Science, Sense About Science, BMJ, James Lind Initiative and CEBM is important. This issue effects all of us: patients, researchers, clinicians, politicians, scientists, and industry.

The petition was followed with a rip roaring editorial by Iain Chalmers, Paul Glasziou and Fiona Godlee in the BMJ that calls for all trials to be registered and their results published. This excellent piece details the consequences of our collective abstention from action and provides advice to patients whom are invited to participate in clinical trials; name:

“Agree to participate in a clinical trial only if: (1) the study protocol has been registered and made publicly available; (2) the protocol refers to systematic reviews of existing evidence showing that the trial is justified; and (3) you receive a written assurance that the full study results will be published and sent to all participants who indicate that they wish to receive them.”

Don’t wait, sign the petition now.

After signing you can automatically share the message “I've just signed the #AllTrials petition for all trials registered and all results reported” on Twitter or Facebook.

Be proud you are taking a step for transparency and improving patient care. I know I am.

Top Ten Clinical Epidemiology studies

Carl Heneghan
Last edited 3rd April 2011

I’ve created a list of what I think are the top ten the most influential epidemiological studies – I’m looking for feedback to see what folk think.

Therefore, if you believe there should be something different on the list then can you post a comment. Rules are it has to be a clinical study that involves people, which excludes basic sciences. In addition the study has to have subsequently influenced the field significantly.

1954
Doll Richard, Bradford Hilly A (June 26, 1954). "The mortality of doctors in relation to their smoking habits. A preliminary report". British Medical Journal 1 (4877): 1451–55. PMID 13160495

1994
Antiplatelet Trialists' Collaboration. Collaborative overview of randomised trials of antiplatelet therapy--I: Prevention of death, myocardial infarction, and stroke by prolonged antiplatelet therapy in various categories of patients BMJ. 1994 Jan 8;308(6921):81-106. PMID 8298418

1989
Cardiac Arrhythmia Suppression Trial (CAST) Investigators. Preliminary report: effect of encainide and flecainide on mortality in a randomized trial of arrhythmia suppression after myocardial infarction. N Engl J Med. 1989;321:406-412. PMID 2473403

1948
MRC Streptomycin in Tuberculosis Trials Committee. Streptomycin treatment of pulmonary tuberculosis. BMJ. 1948;ii:769–783. James Lind summary

1954
Thomas Francis, Robert Korn, et al. "An Evaluation of the the 1954 Poliomyelitis Vaccine Trials." American Journal of Public Health 45 (1955), 50 page supplement with a 63 page appendix. The salk vaccine trials

1994
Randomized trial of cholesterol lowering in 4444 patients with coronary heart disease: The Scandinavian Simvastatin Survival Study Lancet 1994; 344 1383-1389 PMID 7968073

1998 (now retracted)
The Editors Of The Lancet (February 2010). "Retraction--Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children". Lancet 375 (9713): 445. doi:10.1016/S0140-6736(10)60175-4. PMID 20137807.

1976
Bonadonna G, Brusamolino E, Valagussa P, Veronesi U. Adjuvant study with combination chemotherapy in operable breast cancer. Proc Am Assoc Cancer Res Am Soc Clin Oncol 1975;16:254-and N Engl J Med. 1976 Feb 19;294(8):405-10. PMID 1246307

1950
Thomas R. Dawber, M.D., Gilcin F. Meadors, M.D., M.P.H., and Felix E. Moore, Jr., National Heart Institute, National Institutes of Health, Public Health Service, Federal Security Agensy, Washington, D. C., Epidemiological Approaches to Heart Disease: The Framingham Study Presented at a Joint Session of the Epidemiology, Health Officers, Medical Care, and Statistics Sections of the American Public Health Association, at the Seventy-eighth Annual Meeting in St. Louis, Mo., November 3, 1950.
Framingham Heart Study

1855
On the Mode of Communication of Cholera by John Snow, M.D.
London: John Churchill, New Burlington Street, England, 1855 On the Mode of communication of cholera

Look forward to seeing what you think
you can post it to me on twitter
@cebmblog

Cheers Carl

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