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GRADE working group
Are grading evidence and recommendations something new?
Not really. Grading schemes have been used for over 30 years.
There are so many systems for grading evidence and recommendations out there. Why do we need another one?
Because there is a need for one single system to avoid confusion. The single system should avoid shortcomings of
other systems and include their strengths. Some grading systems are based on study design alone without explicit
consideration of other important factors in determining quality of evidence. Some systems are excessively complex.
An analysis of current grading systems has shown that these and other shortcomings have not been adequately addressed
by any one system to date. See: How GRADE compares to other systems
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