Bias exists in NRT alike for poorly conducted RCTs....i.e. unequal treatment of groups, no blinding, no uniform protocols, no indication of why the exclusions...groups will probably not be comparable (selection bias) as no allocation concealment will be done...confounding will be rpesent as would not have dispersed the unknown factors between groups in an equal prob fashion...may lack adjusted analysis which is often used to address confounding...a protocol may not have been prepared....
descriptively...tabular format...lots of detail...
Best Wishes,
Paul
Lead...yet we must also be able to yield as needed
--- On Wed, 2/3/10, Akudo Nwagbara <[log in to unmask]> wrote:
From: Akudo Nwagbara <[log in to unmask]>
Subject: assessment of risk of bias of non randomised studies
To: [log in to unmask]
Received: Wednesday, February 3, 2010, 5:05 PM
Hello, I am writing a systematic review of interventions and intend to include non randomised studies. I will welcome your opinions on how to assess risk of bias of non randomized studies. warm regards
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