Table 2.

PRISMA 2020 for abstract checklist [31].

Section and topic	Item #	Checklist item	Location where Item is reported
Title	1	Identify the report as a systematic review	Abstract, line 5.
Background
Objectives	2	Provide an explicit statement of the main objective (s) or question (s) the review addresses	Abstract, line 5
Methods
Eligibility criteria	3	Specify the inclusion and exclusion criteria for the review	Not stated in abstract
Information sources	4	Specify the information sources (e.g., databases and registers) used to identify studies and the date when each was last searched	Abstract, line 6 and 7
Risk of bias	5	Specify the methods used to assess risk of bias in the included studies	Abstract, line 7
Synthesis of results	6	Specify the methods used to present and synthesize results	Abstract, line 6–8
Results
Included studies	7	Give the total number of included studies and participants and summarize relevant characteristics of studies	Abstract, line 8
Synthesis of results	8	Present results for main outcomes, preferably indicating the number of included studies and participants for each. If meta-analysis was done, reports the summary estimate and confidence/credible interval. If comparing groups, indicate the direction of the effects (i.e., which group is favored)	Abstract, line 8–12
Discussion
Limitation of evidence	9	Provide a brief summary of the limitations of the evidence included in the review (e.g., study risk of bias, inconsistency, and imprecision).	Not stated in abstracts
Interpretation	10	Provide a general interpretation of the results and important implications	Abstract, line 13 and 14
Other
Funding	11	Specify the primary source of funding for the review	Not stated in abstracts
Registration	12	Provide the register name and registration number	Not stated in abstracts