Grade | Recommendation (based on AHCPR,1994) |
---|---|
A | Requires at least one randomised controlled trial as part of the body of literature of overall good quality and consistency addressing the specific recommendation |
B | Requires availability of well conducted clinical studies but no randomised clinical trials on the topic of recommendation. |
C | Requires evidence from expert committee reports or opinions and/or clinical experience of respected authorities, but indicates absence of directly applicable studies of good quality |