Table 1.

Assessment of Multiple Systematic Reviews (AMSTAR) Criteria for the Quality Scoring of the Systematic Review Included

Selection Criteria	Score
1. Was an “a priori” design provided?	1 point
2. Was there duplicate study selection and data extraction?	1 point
3. Was a comprehensive literature search performed?	1 point
4. Was the status of publication (ie, grey literature) used as an inclusion criterion?	1 point
5. Was a list of studies (included and excluded) provided?	1 point
6. Were the characteristics of the included studies provided?	1 point
7. Was the scientific quality of the included studies assessed and documented?	1 point
8. Was the scientific quality of the included studies used appropriately in formulating conclusions?	1 point
9. Were the methods used to combine the findings of studies appropriate?	1 point
10. Was the likelihood of publication bias assessed?	1 point
11. Was the conflict of interest included?	1 point

Notes: Adapted from Shea BJ, Grimshaw JM, Wells GA et al. Development of AMSTAR: a measurement tool to assess the methodological quality of systematic reviews. BMC Med Res Methodol. 2007;7:10.³⁴