Systematic review of current guideline appraisals performed with the Appraisal of Guidelines for Research & Evaluation II instrument-a third of AGREE II users apply a cut-off for guideline quality

A third of AGREE II users apply a cut-off to distinguish between high- and low-quality guidelines, often without clearly describing how the cut-off is generated. Many users might welcome a clear distinction between high- and low-quality guidelines; specifying a cut-off for this purpose might be useful.