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Table 4 Grading systems used to determine the level of evidence and the strength of the recommendation

From: Clinical practice guidelines for the management of chronic musculoskeletal pain in primary healthcare: a systematic review

CPG   Name of grading system Level of evidence grading Strength of recommendation
1 ASIPP [41] United States Preventive Services Task Force (USPSTF) criteria Good
Fair
Poor
None
2 ICSI [31] In transition between ISCI system to GRADE. Thus, using an hybrid system High quality evidence
Low quality evidence
None
3 NOUGG [42] I,
II-1
II-2
II-3
OR III
A,
B,
C
4 RNAO [32] Adapted SIGN Ia
Ib
IIa
IIb
III
IV
None
5 SIGN [30] SIGN 1++, 1+
2++; 2+; 2-
3
4
A,
B,
C,
D,
Good practice point
6 UMHS [43] A
B
C
D
I
II
III
7 WSAMDG [44] Rating scheme (not provided) Not provided None
8 APS AAP [45] Adapted GRADE methodology. High quality evidence
Medium quality evidence
Low quality evidence
Strong recommendation
Weak recommendation
9 Harris [46, 47] Modified Canadian Task Force Grading System I,
II-1
II-2
II-3
OR III
A,
B,
C
10 Raff [48] None None
11 Sanders [33] None None
12 Schnitzer [7] None None
  1. CPG clinical practice guideline