Grading system | Criteria for rating evidence | Criteria for grading recommendation (N) | Number of guidelines | Organization/author responsible for guideline development |
---|---|---|---|---|
GRADE | A, B, C, D | 1 (2), 2 (10) | 16 | CCGI, ACP, AOA, ACCP, TCM Recs, ASCO, JOA, NICE, John W. Devlin, SD Guy, |
System developed by OPTIMa Collaboration | / | Offer, consider (5), do not offer (3) | 2 | OPTIMa |
SIGN | 1++, 1+, 1-, 2++, 2+, 2-, 3, 4 | A, B, C, D | 4 | BGS, CCGPP, NICE |
System recommended by The Cochrane Collaboration Back Review Group and Oxman and Guyatt | A, B, C, D | Recommended (4), Consider using (1), we cannot recommend (3), we do not recommend | 2 | COST B13, CCA |
ACCP | High, moderate, low | Strong, weak (1) | 1 | ACCP |
USPSTF | High, Moderate, Low | A, B (2), C (1), D, I (2) | 1 | SIO |
Combined Grading system | A, B, C+, C, D, D+, D- | Strongly recommended (12), suggested use (4), neutral, suggested no use, strongly not recommended | 2 | OP |
Ranking of the Canadian Task Force on Preventive Health Care | I, II-1, II-2, II-3, III | A, B (1), C, D, E, I | 1 | SOGC |
Classification criteria of TCM literature | I, II, III, IV, V | A, B, C, D, E | 1 | Chen |
CPRC | I, II, III, IV | A, B (7), C, D (2) | CPRC |