| Evidence classification method： |
This guideline follows the internationally accepted pattern and identifies the recommended categories and levels of evidence for the use of diagnosis and assessment, drugs and various treatments. Recommended categories: Category I is proven and/or agreed to be beneficial and effective; The evidence for class II efficacy is inconsistent or controversial, among which the relevant evidence tends to be effective for class IIa, and insufficient for Class II B. Category III is proven or agreed to be useless or ineffective and may even be harmful. Level of evidence: Grade A for evidence from multiple randomized controlled clinical trials or multiple meta-analyses, grade B for evidence from single randomized controlled clinical trials or non-randomized studies, and grade C for evidence from small studies or expert consensus. |
