Table 2.

Criteria for setting recommendation grades

Level of evidence	Consensus (median value of Delphi evaluation)
	8 or more	7	6–4	3 or less
I	A	A	C2	D
II	A	B	C2	D
III	B	B	C2	D
IV	B	C1	C2	D
V	C1 (B*)	C1	C2	D
VI	C1 (B*)	C1	C2	D