From:  Expert Consensus on Type 2 Diabetes Remission

 GRADE Level of evidence and grading criteria for recommendations.

Recommendation GradeLevel of EvidenceDescription
Strong (A)High (1)Single multicenter RCT study (raw data open source); systematic reviews based on RCTs (with homogeneity, raw data open source); large sample data mining studies (raw data open source); meta-analysis and systematic reviews
Conditional (B)Moderate (2a/2b)Single RCTs (raw data not open-source); systematic reviews of classic case-control based studies (with homogeneity); large sample cohort studies (raw data open-source); single case-control study
Weak (C)Low (3)Case report; low-quality cohort study; cross-sectional study
Very Weak (D)Very Low (4)Expert opinion or comment