Table 1

Critical and non-critical domains of A MeaSurement Tool to Assess systematic Reviews 2 (AMSTAR 2) quality assessment tool

Critical domainsNon-critical domains
Protocol development/registration before commencement of the reviewSatisfying the components of PICO (population, intervention, comparison, and outcome)
Comprehensiveness of the literature searchClarification of the reasons for selection of the study designs for inclusion in the review.
Justification for studies’ exclusionStudy selection is done in duplicate
Assessment of the risk of biasExtraction is done in duplicate
Appropriateness of meta-analysisDetailed description of the included studies
Accounting for risk of bias in the discussionReport on the sources of funding for the primary studies
Assessment of publication biasAssessment of the potential impact of risk of bias on the results of the evidence synthesis
Satisfactory explanation for any heterogeneity
Report of any potential sources of conflict of interest