Centre for Evidence-Based Medicine

Short description: Centre at the University of Oxford, UK

Centre for Evidence-Based MedicineType| Public

|

Established| 1995

Parent institution

| University of Oxford
Director| Carl Heneghan

Academic staff

| 25
Students| 5 full-time DPhils, 28 part-time DPhils and 75 MSc students
Location|

Oxford

England

Website| {{{1}}}

The Centre for Evidence-Based Medicine (CEBM) is an academic research center in the Nuffield Department of Primary Care Health Sciences at the Medical Sciences Division at the University of Oxford in England. It focuses on the practice, teaching, and dissemination of high quality evidence-based medicine to improve healthcare in everyday clinical practice.

CEBM was founded by David Sackett in 1995. It was subsequently directed by Brian Haynes and Paul Glasziou. Since 2010 it has been led by Professor Carl Heneghan, a clinical epidemiologist and general practitioner.[1]

There are currently over 25 active staff and honorary members of the CEBM. The staff include clinicians, statisticians, epidemiologists, information specialists, quantitative and qualitative researchers.

## Contents

* 1 Teaching and degrees
* 2 EBM Live conference
* 3 Notable projects
* 3.1 Levels of evidence
* 3.2 Tamiflu
* 3.3 Sports products
* 3.4 Self care
* 3.5 AllTrials
* 3.6 Diagnostic technologies and reasoning
* 3.7 COMPare project
* 3.8 Adverse events
* 4 Notable associates
* 5 References

## Teaching and degrees

CEBM is the academic lead for Oxford University's Graduate School in Evidence-Based Healthcare, together with the university's Department of Continuing Education. The Graduate School includes a MSc in Evidence-Based Health Care[2] and a DPhil in Evidence-Based Health Care,[3] along with a range of short courses, including a course on the History and Philosophy of Evidence-Based Healthcare which was developed by Jeremy Howick and Iain Chalmers.[4]

## EBM Live conference

Every year, CEBM organises EBM Live (previously Evidence Live),[5] a multi-day conference focussing on developments in the area of evidence-based medicine. The conference is organised in collaboration with the British Medical Journal. Themes for the conference include Improving the Quality of Research; disentangling the Problems of Too Much and Too Little Medicine; transforming the Communication of Evidence for Better Health; training the Next Generation of Leaders and translating Evidence into Better-Quality Health Services.

## Notable projects

### Levels of evidence

CEBM has developed a widely adopted[6] systematic hierarchy of the quality of medical research evidence, named the levels of evidence. Systematic reviews of randomised clinical trials (encompassing homogeneity) are seen as the highest possible level of evidence, as full assessment and aggregated synthesis of underlying evidence is possible.

### Tamiflu

In collaboration with the British Medical Journal, Carl Heneghan and team found no evidence that Tamiflu helped to reduce complications of influenza.[7][8] This has become a controversial topic, as the United Kingdom government spend £473 million (as of 2014[update]) on the purchase of Tamiflu, despite the systematic review[9] claiming to find no evidence for the effectiveness of it.[10]

### Sports products

A systematic review conducted in 2012 discovered very little effect of carbohydrate drinks on sport performance of the general population.[11][12] This work formed part of a joint investigation with BBC Panorama and the British Medical Journal.[13] A linked article published in the BMJ reported a "striking lack of evidence" to back up claims for popular sports brands.[14] A further analysis of a broad range of sports products showed that the evidence for many sports products is poor quality and insufficient to inform the public about the benefits and harms of the products.[14]

### Self care

Systematic review and individual patient data meta analysis research[15] in the centre has shown that, even with little training, people on oral anticoagulation (warfarin) can successfully self-monitor, and even self-manage their disease in the community.[16] Patients capable of self-monitoring and self-adjusting therapy have fewer thromboembolic events and lower mortality than those who self-monitor alone.[17] In 2014, Carl Heneghan along with Alison Ward became directors of a World Health Organization Collaborating Centre for self-care in non-communicable disease.[18]

### AllTrials

The centre is one of the co-founders of the AllTrials campaign, which has been influential in ensuring that the results of all clinical trials are registered and reported in full.

### Diagnostic technologies and reasoning

The centre has a strong diagnostic theme which includes assessing novel diagnostic technologies relevant to improving the diagnosis of disease in primary care and also to improving diagnostic reasoning. In 2015, the centre produced a report for the Department of Health on antimicrobial resistance diagnostics, which highlighted the considerable number of new diagnostic technologies in development to underpin rational prescribing of antibiotics.[19]

### COMPare project

In 2015 the COMPare project was launched, addressing outcome switching in clinical trials. The project systematically checks every trial published in the top five medical journals, to see if they have misreported their findings, comparing each clinical trial report against its registry entry. The project has found that some trials report their outcomes perfectly, but for many others outcomes specified in the registry entry were never reported. The updates to the trials are updated live on the COMPare website. The project highlights how researchers are duped by the common practice in clinical trial reporting of "outcome switching".[20]

### Adverse events

In March 2016, research at the centre systematically identified 353 medicinal products withdrawn worldwide because of adverse drug reactions, assessed the level of evidence used for making the withdrawal decisions, and found that only 40 drugs were withdrawn worldwide.[21] Withdrawal was significantly less likely in Africa than in other continents.[22] Furthermore, in 47% of the 95 drugs for which death was documented as a reason for withdrawal, more than two years elapsed between the first report of a death and withdrawal of the drug.[23]

## Notable associates

Notable associates of the centre include:[24]

* Professor Ben Goldacre
* Sir Iain Chalmers
* Margaret McCartney
* Muir Gray
* Professor Rod Jackson University of Auckland

## References

1. ↑ "Professor Carl Heneghan". https://www.ox.ac.uk/news-and-events/find-an-expert/professor-carl-heneghan.
2. ↑ "MSc in Evidence-Based Health Care". http://www.ox.ac.uk/admissions/graduate/courses/msc-evidence-based-health-care.
3. ↑ "DPhil in Evidence-Based Health Care". https://www.conted.ox.ac.uk/courses/details.php?id=70.
4. ↑ Jeremy Howick (2011-02-23). The Philosophy of Evidence-based Medicine. John Wiley & Sons. ISBN 978-1-4443-4266-6. https://books.google.com/books?id=O8djbHBva5IC&pg=PA15.
5. ↑ "Evidence Live Global Forum". http://evidencelive.org/.
6. ↑ "Levels of Evidence / Google Scholar". https://scholar.google.co.uk/scholar?q="levels+of+evidence"+oxford&btnG=&hl=en&as_sdt=0,5.
7. ↑ Butler, Declan (2014). "Tamiflu report comes under fire". Nature 508 (7497): 439–40. doi:10.1038/508439a. PMID 24759392. Bibcode: 2014Natur.508..439B.
8. ↑ "Zanamivir for influenza in adults and children: systematic review of clinical study reports and summary of regulatory comments". BMJ 348. 2014. doi:10.1136/bmj.g2547. PMID 24811412.
9. ↑ "Neuraminidase inhibitors for preventing and treating influenza in healthy adults and children". The Cochrane Database of Systematic Reviews 4 (4). 2014. doi:10.1002/14651858.CD008965.pub4. PMID 24718923.
10. ↑ "Tamiflu: Millions wasted on flu drug, claims major report". BBC. 10 April 2014. https://www.bbc.co.uk/news/health-26954482.
11. ↑ "'Lack of evidence' that popular sports products work". BBC. 19 July 2012. https://www.bbc.co.uk/news/health-18863293.
12. ↑ "Forty years of sports performance research and little insight gained". BMJ 345. 2012. doi:10.1136/bmj.e4797. PMID 22810388.
13. ↑ "'Lack of evidence' that popular sports products work". BBC News. 19 July 2012. https://www.bbc.co.uk/news/health-18863293.
14. ↑ 14.0 14.1 "The evidence underpinning sports performance products: a systematic assessment". BMJ Open 2 (4). 2012. doi:10.1136/bmjopen-2012-001702. PMID 22815461.
15. ↑ "Self-monitoring of oral anticoagulation: systematic review and meta-analysis of individual patient data". The Lancet 379 (9813): 322–34. 2012. doi:10.1016/S0140-6736(11)61294-4. PMID 22137798. http://discovery.ucl.ac.uk/1468252/1/Gardiner_28. Heneghan Lancet 2011.pdf.
16. ↑ "Cohort study of Anticoagulation Self-Monitoring (CASM): a prospective study of its effectiveness in the community". The British Journal of General Practice 65 (636): e428–37. 2015. doi:10.3399/bjgp15X685633. PMID 26077267.
17. ↑ Heneghan, Carl J.; Garcia-Alamino, Josep M.; Spencer, Elizabeth A.; Ward, Alison M.; Perera, Rafael; Bankhead, Clare; Alonso-Coello, Pablo; Fitzmaurice, David et al. (5 July 2016). "Self-monitoring and self-management of oral anticoagulation". The Cochrane Database of Systematic Reviews 7 (4). doi:10.1002/14651858.CD003839.pub3. ISSN 1469-493X. PMID 27378324. PMC 8078378. https://ora.ox.ac.uk/objects/uuid:2d40f889-275e-471a-99b5-567a2f45f80c/download_file?safe_filename=Heneghan_et_al-2016-.pdf&file_format=application/pdf&type_of_work=Journal+article.
18. ↑ "WHOCC – WHO Collaborating Centres: WHO Collaborating Centre for Self-Care". WHO. 28 March 2014. http://apps.who.int/whocc/Detail.aspx?cc_ref=UNK-256&cc_city=oxford&.
19. ↑ Pluddemann, Annette; Onakpoya, Igho; Harrison, Sian; Shinkins, Bethany; Shinkins, Bethany; Tompson, Alice; Davis, Ruth; Price, Christopher P. et al. (June 2015). "Position Paper on Anti-Microbial Resistance Diagnostics". Centre for Evidence-Based Medicine. http://www.cebm.net/position-paper-on-anti-microbial-resistance-diagnostics/.
20. ↑ "How researchers dupe the public with a sneaky practice called "outcome switching"". 29 December 2015. https://www.vox.com/2015/12/29/10654056/ben-goldacre-compare-trials.
21. ↑ Worldwide withdrawal of medicinal products because of adverse drug reactions: a systematic review and analysis.Onakpoya IJ, Heneghan CJ, Aronson JK. Crit Rev Toxicol. 2016 Mar 3:1–13
22. ↑ Onakpoya, Igho J.; Heneghan, Carl J.; Aronson, Jeffrey K. (2016). "Post-marketing withdrawal of 462 medicinal products because of adverse drug reactions: a systematic review of the world literature". BMC Medicine 14: 10. doi:10.1186/s12916-016-0553-2. PMID 26843061.
23. ↑ Onakpoya, Igho J; Heneghan, Carl J; Aronson, Jeffrey K (2015). "Delays in the post-marketing withdrawal of drugs to which deaths have been attributed: a systematic investigation and analysis". BMC Medicine 13: 26. doi:10.1186/s12916-014-0262-7. PMID 25651859.
24. ↑ "Who we are — Centre for Evidence-Based Medicine (CEBM), University of Oxford". https://www.cebm.ox.ac.uk/about-us/team?tab=cebm-senior-associates/.

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