Standardised GoR
Standardised GoR | Strength of recommendation in guideline | Level of evidence |
---|---|---|
A | Strong recommendation against a test, medical intervention or healthcare service based on strong solid evidence | Strong evidence (eg, systematic reviews of RCTs or level 1 diagnostic studies, individual RCTs) |
B | Recommendation against a test, medical intervention or healthcare service based on moderate evidence | Moderate evidence (eg, systematic reviews of cohort studies or level >2 diagnostic studies, individual cohort studies, ecological studies) |
C | Recommendation against a test, medical intervention or healthcare service based on expert consensus | No evidence possible or sought |
D | No recommendation for or against a test, medical intervention or healthcare service because of unclear or conflicting evidence | Weak evidence (eg, systematic reviews of case–control studies or level 3b diagnostic studies, individual case–control studies, case series, poor or non-independent reference standard, expert opinion) |
GoR, grade of recommendation; RCT, randomised controlled trial.