“…Ultimately, it's what you put into the data blender that determines the quality of the guideline recommendations. In a recent study, it appears that the strength of evidence correlated with recommendation levels [1]. Of 939 statements across 29 AUA guidelines in 2021, the levels of evidence were: Grade A: 39 (4.2%), Grade B: 188 (20%), Grade C: 297 (31.6%), Clinical Principle: 185 (19.7%) and Expert Opinion: 230 (24.5%).…”