The Infectious Diseases Society of America (IDSA) proposed a ranking system for the strength of recommendations made in a clinical guideline.
Parameters:
(1) recommendation
(1) strength of the evidence
|
Recommendation
|
Evidence
|
IDSA Category
|
|
for use
|
good
|
A
|
|
for use
|
moderate
|
B
|
|
for or against use
|
poor
|
C
|
|
against use
|
moderate
|
D
|
|
against use
|
good
|
E
|
where:
• Category C would apply for situations where evidence was neutral (neither for nor against).
• This would correspond to a scale from +2 to -2.
