Table 2 The codes of different grading systems in TCM guidelines
From: A critical review to grading systems and recommendations of traditional Chinese medicine guidelines
Grading systems | Codes of evidence and recommendation | Number of Guidelines (%) | |
|---|---|---|---|
Quality of evidence | Strength of recommendation | ||
TCM grading system | Ia, Ib, IIa, IIb, IIIa, IVb, IV, V | A, B, C | 53 (77.9) |
GRADE system | A, B, C, D | 1, 2 | 4 (5.9) |
Oxford system | 1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b, 4, 5 | A, B, C, D | 4 (5.9) |
Adapted David Sackett system | A, B, C | I, IIa, IIb, III, IV | 3 (4.3) |
SIGN system | 1, 2, 3, 4 | A, B, C, D, E | 1 (1.5) |
Adapted NEEBGDP system | I, II, III, IV | A, B, C, experts opinion | 1 (1.5) |
Adapted AHRQ system | Ia, Ib, II, III, IVa, IVb | A+, A-, B+, B-, C, D | 1 (1.5) |
AHRQ system | Ia, Ib, IIa, IIb, III, IV | A, B, C, D | 1 (1.5) |