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Showing posts with label research. Show all posts
Showing posts with label research. Show all posts

Friday, August 04, 2017

Distractions Research

John Mandrola, MD
DISCLOSURES 
August 02, 2017
After 2 decades of practicing medicine, I have come to believe that distraction is one of the clinician's greatest foes. We miss important stuff because nonsense steals our full attention.
Having spent the past few years reviewing and reporting on studies, I think distraction also impedes medical progress. The new phenomenon of worship of page views and clickability exacerbates the problem of distracting wasteful research. Good studies (signal) are droned out by the observational nonsense (noise). In these days of information overload, attention has never been more vital.
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Remedies

It's unlikely that an opinion column from one doctor will stem the onslaught of wasteful, distracting research studies. But some simple things may help lessen the distraction of overhyped research:
  • Journals could be more restrictive in their acceptance of weak papers and more transparent in listing the weaknesses of a study. Why not put limitations in the abstract?
  • Authors and journals should tone down the press releases. Please. I am far more likely to read and report on a study that exudes honesty in the lead paragraph of a press release.
  • Readers need to be more informed and skeptical about common biases. Think more about confounding factors and reverse causation. And always remember that correlation does not mean causation.

Friday, March 17, 2017

Statins controversy

Jane Armitage and colleagues, led by senior author Rory Collins, (Nov 5, p 2237)1 and Richard Horton (Nov 5, p 2237)2 appear to believe that retraction of an article from The BMJ will end the debate about statins and primary prevention. Even were there grounds for retraction, I fear they would be disappointed. Questions about the evidence base for statins continue to emerge from many quarters: how strong is the evidence, how large is the benefit for individuals at lowest risk of heart disease, how well did the trials record common minor side-effects, how representative were the trials of women and the elderly, what was the effect of active run-in periods and composite endpoints, how does taking a statin affect a person's diet and exercise patterns, why is there a discrepancy between the real-life experience of muscle pain and what was reported in the trials, why have the data for harms not yet been given the same levels of scrutiny as the data for benefits, and is cholesterol a reliable surrogate endpoint to guide prevention of cardiovascular disease?3, 4
So despite Horton and Collins and colleagues wanting to shut down the discussion and award themselves the final word, the debate about statins in primary prevention is alive and kicking. It is a debate that needs to be resolved as thoughtfully, objectively, and openly as possible, and not by eminence-based narrative reviews,5 however extensive, based on meta-analysis of data that only Collins, his fellow trialists, and industry sponsors have seen. This absence of independence and transparency is not unusual in medicine—indeed it is sadly still very much the norm. Why then should statins be singled out in calls for independent review of the raw data?6 Because they are already the most widely prescribed class of drug in high-income and middle-income countries, and because proposals for even wider prescription have sparked justifiable controversy. As the reassessment of the evidence on oseltamivir showed, when unabridged internal clinical study reports containing anonymised patient-level data are scrutinised by fresh expert eyes, new information and uncertainties emerge to guide decisions and inform future research.7 Collins and Horton would do most to resolve this damaging controversy by adding their voices to calls for independent review of the data for statins.
Their attacks on Virginia Barbour and the Committee on Publication Ethics (COPE) are misinformed and based on inaccurate and selective reporting. Barbour's delay in recusing herself from handling a complaint against The BMJ was in part due to a change in personnel at The BMJ, which created a conflict of interest partway through the process. COPE investigated the complaint to the full extent of its remit, more quickly than reported in The Lancet, and with due care to ensure independence. COPE's conclusion was emphatic: that The BMJ had taken “extraordinary steps” and “acted appropriately by completing an internal investigation and audit to a high standard, and promoted transparency by making information on the process publicly available”.
Comparisons between the statin saga and the measles, mumps, and rubella vaccine scare also do not serve Horton or Collins well. The BMJ's article in question was not a poorly done and fraudulent piece of research8 but an expert reanalysis and commentary;9 after it was published it was not the journal or the authors but Collins who launched the media scare when he went to the press despite repeated invitations to air his concerns in The BMJ. The BMJ did not attempt to cover up concerns,10leading to years of delay, but corrected the article within months and referred the decision about retraction to a panel of experts. Retraction Watch called the panel's report “the most detailed justification for a journal's decision not to retract a paper that we've seen in a long time, perhaps ever”.
I fully support efforts to ensure that everyone involved in creating and publishing medical knowledge can be held accountable. I also support proposals for a radical rethink about how the evidence base is built and used. In this effort, the lessons learnt by all parties involved in the statins saga could play an important part.

For questions about the evidence base for statins see http://blogs.bmj.com/bmj/2016/09/12/richard-lehman-where-next-with-statins/
For the EBM Manifesto see http://evidencelive.org/manifesto/
I was Chair of COPE from 2002 to 2005 and have helped to draft its original code of conduct for editors published in 2004. I commissioned and edited Brian Deer's BMJ series on the measles, mumps, and rubella vaccine scare. The BMJ runs campaigns on overtreatment, open clinical trial data, and access to the clinical trial data for statins. The BMJ receives a proportion of its income from pharmaceutical advertising and sponsorship.

References

  1. Armitage, J, Baigent, C, and Collins, R. Lessons from the controversy over statins—Authors' reply.Lancet20163882237–2238
  2. Horton, R. Lessons from the controversy over statins—Editor's reply. Lancet20163882237
  3. Krumholz, HM. Statins evidence: when answers also raise questions. BMJ2016354i4963
  4. Redberg, RF and Katz, MH. Statins for primary prevention: the debate is intense but the data are weak. JAMA Intern Med201717721–23
  5. Collins, R, Reith, C, Emberson, J et al. Interpretation of the evidence for the efficacy and safety of statin therapy. Lancet20163882532–2561
  6. Godlee, F. Statins: we need an independent review. BMJ2016354i4992
  7. Jefferson, T, Jones, M, Doshi, P, Spencer, EA, Onakpoya, I, and Heneghan, CJ. Oseltamivir for influenza in adults and children: systematic review of clinical study reports and summary of regulatory comments. BMJ2014348g2545
  8. Deer, B. How the case against the MMR vaccine was fixed. BMJ2011342c5347
  9. Abramson, J, Rosenberg, HG, Jewell, N, and Wright, JM. Should people at low risk of cardiovascular disease take a statin?. BMJ2013347f6123
  10. Deer, B. Secrets of the MMR scare. The Lancet's two days to bury bad news. BMJ2011342c7001

Wednesday, March 01, 2017

Clinical Trials Consent

EVIEW ARTICLE
Jeffrey M. Drazen, M.D., David P. Harrington, Ph.D., John J.V. McMurray, M.D., James H. Ware, Ph.D., Janet Woodcock, M.D., Editors

Informed Consent

Christine Grady, R.N., Ph.D., Steven R. Cummings, M.D., Michael C. Rowbotham, M.D., Michael V. McConnell, M.D., M.S.E.E., Euan A. Ashley, F.R.C.P., D.Phil., and Gagandeep Kang, M.D., Ph.D.
N Engl J Med 2017; 376:856-867March 2, 2017DOI: 10.1056/NEJMra1603773
 Comments open through April 5, 2017
IDEO
MyHeart Counts.
MyHeart Counts.
VIDEO
Example of Video Consent.
Example of Video Consent.
This multipart review provides an overview of innovative approaches to improving and expanding the informed consent process for researchers and participants, along with short essays covering specific areas of innovation.
Christine Grady, R.N., Ph.D.
In the classic interaction in which informed consent is obtained for research, an investigator presents the potential participant with information regarding a new therapeutic, diagnostic, or prophylactic intervention and then asks the participant to read and sign a detailed written consent document. /.../

Friday, January 13, 2017

Dr. Richard Levins

Referência da AMICOR Maria Inês Reinert Azambuja
By Tamara Awerbuch Friedlander

Saturday, October 19, 2013

Declaration of Helsinki

The 50th Anniversary of the Declaration of HelsinkiProgress but Many Remaining Challenges FREE ONLINE FIRST

Joseph Millum, PhD1,2; David Wendler, PhD1; Ezekiel J. Emanuel, MD, PhD3,4
JAMA. Published online October 19, 2013. doi:10.1001/jama.2013.281632
Text Size: A A A
Since 1964, through 7 revisions, the World Medical Association’s (WMA’s) Declaration of Helsinki has stood as an important statement regarding the ethical principles guiding medical research with human participants. The declaration is consulted by ethics review committees, funders, researchers, and research participants; has been incorporated into national legislation; and is routinely invoked to ascertain the ethical appropriateness of clinical trials.
There is much to praise about the revision process and the latest revision, which coincides with the declaration’s 50th anniversary. The Working Group extensively consulted stakeholders and justified the proposed revisions. The result is a declaration that is better organized into clear sections, more precise, and likely to be more effective at protecting research participants.
For the first time, the declaration requires compensation and treatment for research-related injuries (paragraph 15), an explicit recognition that research participants should not bear the costs of research gone wrong.1 The revised declaration’s emphasis on the dissemination of research results, including studies with negative results, should increase the value of medical research (paragraphs 23, 35, and 36)./.../
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October 19, 2013
Special Communication
World Medical Association Declaration of Helsinki:  Ethical Principles for Medical Research Involving Human Subjects    
World Medical Association.
JAMA. Published online October 19, 2013. doi:10.1001/jama.2013.281053
Viewpoint
The Declaration of Helsinki, 50 Years Later    
Paul Ndebele, PhD.
JAMA. Published online October 19, 2013. doi:10.1001/jama.2013.281316
The 50th Anniversary of the Declaration of Helsinki:  Progress but Many Remaining Challenges    
Joseph Millum, PhD, David Wendler, PhD, Ezekiel J. Emanuel, MD, PhD.
JAMA. Published online October 19, 2013. doi:10.1001/jama.2013.281632
JAMA is publishing the revised Declaration of Helsinki, 2 related Viewpoints, and an audio interview to coincide with the release of the 7th revision of the declaration by the World Medical Association #WMAGA13.

Friday, July 19, 2013

Shadow on Drug Trial

Science
Vol. 341 no. 6143 p. 223 
DOI: 10.1126/science.341.6143.223
  • NEWS & ANALYSIS
JAPAN

Tampered Data Cast Shadow on Drug Trial

A clinical trial led by cardiologist Hiroaki Matsubara of Kyoto Prefectural University of Medicine indicated that the blockbuster hypertension drug valsartan lowers the risk of stroke and angina for some patients. A university investigation, however, concluded that data had been manipulated; after reanalysis, the reduced risk of stroke and angina disappeared. The paper was retracted and Matsubara resigned from the university. But the fallout continues: The scandal has eroded confidence in Japan's biomedical research and raised concerns about cozy ties between researchers and drug companies.

Monday, June 03, 2013

Gaps in Health Research

Use of data from registered clinical trials to identify gaps in health research and development
Roderik F Viergever,a  Robert F Terryb  & Ghassan Karamc

Objective To explore what can be learnt about the current composition of the “global landscape” of health research and development (R&D) from data on the World Health Organization’s International Clinical Trials Registry Platform (ICTRP).
Methods A random 5% sample of the records of clinical trials that were registered as interventional and actively recruiting was taken from the ICTRP database.
Findings Overall, 2381 records of trials were investigated. Analysis of these records indicated that, for every million disability-adjusted life years (DALYs) caused by communicable, maternal, perinatal and nutritional conditions, by noncommunicable diseases, or by injuries, the ICTRP database contained an estimated 7.4, 52.4 and 6.0 trials in which these causes of burden of disease were being investigated, respectively. For every million DALYs in high-income, upper-middle-income, lower-middle-income and low-income countries, an estimated 292.7, 13.4, 3.0 and 0.8 registered trials, respectively, were recruiting in such countries.
Conclusion The ICTRP constitutes a valuable resource for assessing the global distribution of clinical trials and for informing policy development for health R&D. Populations in lower-income countries receive much less attention, in terms of clinical trial research, than populations in higher-income countries./.../