|
Evidence quality
|
Preponderance of benefit over harm
|
Balance of benefit and harm
|
Preponderance of harm over benefit
|
|---|
|
A. Well-designed RCTs
|
Strong recommendation
|
Option
|
Strong recommendation against
|
|
B. RCT’s with minor limitations; overwhelming consistent evidence from observational studies
|
Recommendation
|
|
C. Observational studies (case–control and cohort design)
|
Recommendation against
|
|
D. Expert opinion; case reports; reasoning from first principles
|
Option
|
No recommendation
|
- RCT randomized controlled trial