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. 2019 Jan 22;61(3):242–285. doi: 10.1111/dmcn.14132

Table 4.

Levels of recommendations

Level of evidence (GRADE) Recommendation for/against Recommendation level
1 ‘should’, ‘should not’, or ‘is not indicated’ A
2 ‘may’/‘suggest’ or ‘may not’/‘not suggest’ B
3 or 4 ‘may be considered’ or ‘do not know’ 0

Levels of evidence for recommendations are based on the analysis of the literature and transferred into detailed wording in the clinical recommendations with defined levels of recommendations.