Grade | Quality of evidence |
---|---|
A1 | Good systematic review, randomised controlled trial or other appropriate study design |
A2 | Convincing non-experimental evidence (see definition in text) |
B1 | Inconclusive evidence. A good quality study where the results could not be assumed to apply to the patient in the community paediatric setting |
B2 | Inconclusive evidence. Poor study design or inadequate study power |
C | Evidence of ineffectiveness |
D | No evidence found |