J Can Chiropr Assoc 2021 Apr; 65 (1): 32–49.

Figure 2.

SIGN checklist for systematic review ⁷²

SIGN = Scottish Intercollegiate Guideline Network

^a   Rating: “Yes” = 1, “No” or unable to tell from the article = 0

^b   Scoring: Sum of items - >9 high quality, low risk of bias; 6–9 acceptable quality, moderate risk of bias; <6 low quality, high risk of bias; if 1 and/or 3 are “no” Unacceptable quality (reject)