Dear Colleagues,
If you have any responses to this query, would you be kind enough to
send them to Jeremy Howick directly.
Thanks,
Olive
Olive Goddard
Centre and Editorial Manager
Centre for Evidence-Based Medicine
Room 116
Institute of Health Sciences
Old Road Campus, Headington
Oxford, OX3 7LF
.....................................................................
Tel: +44 (0)1865 226991 email: [log in to unmask]
Fax: +44 (0)1865 226845 web: www.cebm.net
Mobile: 0773 484 2403 web: www.cebmh.com
>>> "Howick,J (pgr)" <[log in to unmask]> 01/04/06 2:33 pm >>>
Hi,
Happy New Year! I'm a PhD candidate at the London School of Economics
(LSE) specializing in the Philosophy of Medicine. I am currently
working
on a project with Professor Nancy Cartwright on Evidence for Policy
Evaluations, which may eventually be of interest to the CEBM.
I have a question regarding the CEBM grades of evidence that was not
answered on the website (http://www.cebm.net/levels_faq.asp). Here is
my
question:
How would the CEBM weigh level 2 or 3 evidence with level 1 evidence?
For example, what if there were many observational studies which
conflicted with a single well-done RCT - would the results from the
more
numerous observational studies outweigh the single RCT?
Please forward this question to whoever can answer it. Cheers!
I look forward to hearing from you soon,
Jeremy Howick
|