Table 3

Suggested Walkovers between Taxonomies for Assessing the Strength of a Recommendation Based on a Body of Evidence

SORTCEBMBMJ’s Clinical Evidence
A. Recommendation based on consistent and good quality patient-oriented evidenceA. Consistent level 1 studiesBeneficial
B. Recommendation based on inconsistent or limited-quality patient-oriented evidenceB. Consistent level 2 or 3 studies or extrapolations from level 1 studiesLikely to be beneficial Likely to be ineffective or harmful (recommendation against)
C. Level 4 studies or extrapolations from level 2 or 3 studiesUnlikely to be beneficial (recommendation against)
C. Recommendation based on consensus, usual practice, disease-oriented evidence, case series for studies of treatment or screening, and/or opinionD. Level 5 evidence or troublingly inconsistent or inconclusive studies of any levelUnknown effectiveness
  • SORT, Strength Of Evidence Taxonomy; CEBM, Centre for Evidence-Based Medicine; BMJ, BMJ Publishing Group.