Dear Colleagues,
If anyone can answer Jennifer's query, I should be grateful if you
would respond to her directly.
All good wishes,
Olive
Olive Goddard
Centre and Editorial Manager
Centre for Evidence-Based Medicine
Department of Primary Health Care
Old Road Campus, Headington
Oxford, OX3 7LF
.....................................................................
Tel: +44 (0)1865 289337 email: [log in to unmask]
Fax: +44 (0)1865 289336 web: www.cebm.net
Mobile: 07804 625002 web: www.cebmh.com ( http://www.cebmh.com )
>>> 彭 伊君 <[log in to unmask]> 16/10/2007 07:08 >>>
Dear Sir/ Madam,
Two question about "level of evidence" are illustrated below:
(1) What's the difference between "individual" case-control study and
"poor quality" case control study?
(2) should control samples in case-control study be normal people? Or
can I operate the intervention or placebo in two groups of the same
population via convenient sampling, and also call it as "case control
study"?
Please answer them for me. Thanks a lot!
Regards,
Jennifer Peng,
Graduate Institute of Physical Theraoy, National Taiwan University
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