Grades of recommendation | |
A | Consistent evidence = clear outcome |
B | Inconsistent evidence = unclear outcome |
C | Insufficient evidence = consensus |
Suffix for recommendations | |
Preventative and therapeutic intervention studies# | |
1 | SR or MA of RCTs |
2 | 1 RCT or >1 RCT, but no SR or MA |
3 | 1 cohort study or >1 cohort study, but no SR or MA |
4 | Other |
Diagnostic, prognostic, aetiological and other types of studies | |
1 | SR or MA of cohort studies |
2 | 1 cohort study or >1 cohort study, but no SR or MA |
3 | Other |
SR: systematic review; MA: meta-analysis; RCT: randomised controlled trial. #: including harm.