**PRISMA 2020 Checklist**
1. Identify the report as a systematic review. (Location: Title page)
2. See the PRISMA 2020 for Abstracts checklist. (Location: Abstract)
3. Describe the rationale for the review in the context of existing knowledge. (Location: Introduction 1.1)
4. Provide an explicit statement of the objective(s) or question(s) the review addresses. (Location: Introduction 1.2)
5. Specify the inclusion and exclusion criteria for the review and how studies were grouped for the syntheses. (Location: Methods 2.2)
6. Specify all databases, registers, websites, organisations, reference lists and other sources searched or consulted to identify studies. Specify the date when each source was last searched or consulted. (Location: Methods 2.3, 2.4)
7. Present the full search strategies for all databases, registers and websites, including any filters and limits used. (Location: Methods 2.4, Appendix B)
8. Specify the methods used to decide whether a study met the inclusion criteria of the review, including how many reviewers screened each record and each report retrieved, whether they worked independently, and if applicable, details of automation tools used in the process. (Location: Methods 2.5)
9. Specify the methods used to collect data from reports, including how many reviewers collected data from each report, whether they worked independently, any processes for obtaining or confirming data from study investigators, and if applicable, details of automation tools used in the process. (Location: Methods 2.6, Appendix C)
10a. List and define all outcomes for which data were sought. Specify whether all results that were compatible with each outcome domain in each study were sought. (Location: Methods 2.2, 2.6)
10b. List and define all other variables for which data were sought. (Location: Methods 2.6, Appendix C)
11. Specify the methods used to assess risk of bias in the included studies, including details of the tool(s) used, how many reviewers assessed each study and whether they worked independently, and if applicable, processes of obtaining or confirming information from study investigators. (Location: Methods 2.7, Appendix D)
12. Specify for each outcome the effect measure(s) used in the synthesis or presentation of results. (Location: N/A—narrative synthesis)
13a. Describe the processes used to decide which studies were eligible for each synthesis. (Location: Methods 2.8)
13b. Describe any methods required to prepare the data for presentation or synthesis. (Location: Methods 2.6, 2.8)
13c. Describe any methods used to tabulate or visually display results of individual studies and syntheses. (Location: Results 3.1–3.4, Tables 1–4)
13d. Describe any methods used to synthesise results and provide a rationale for the choice(s). (Location: Methods 2.8)
13e. Describe any methods used to explore possible causes of heterogeneity among study results. (Location: Discussion 4.1–4.4)
13f. Describe any sensitivity analyses conducted to assess robustness of the synthesized results. (Location: N/A—narrative synthesis)
14a. Describe the results of the search and selection process, from the number of records identified in the search to the number of studies included in the review, ideally using a flow diagram. (Location: Results 3.1, Figure 1)
14b. Cite studies that might appear to meet the inclusion criteria, but which were excluded, and explain why they were excluded. (Location: Appendix A (excluded studies not listed but described in screening))
15. Cite each included study and present its characteristics. (Location: Table 1, Appendix A)
16. Present assessments of risk of bias for each included study. (Location: Appendix D)
17. For all outcomes, present, for each study: (a) summary statistics for each group and (b) an effect estimate and its precision. (Location: Tables 2–4, Results 3.2–3.3)
18a. For each synthesis, briefly summarise the characteristics and risk of bias among contributing studies. (Location: Discussion 4.1)
18b. Present results of all statistical syntheses conducted. (Location: N/A—narrative synthesis)
18c. Present results of all investigations of possible causes of heterogeneity among study results. (Location: Discussion 4.2)
18d. Present results of all sensitivity analyses conducted. (Location: N/A)
19. Present assessments of risk of bias due to missing results arising from reporting biases. (Location: Discussion 4.4)
20. Present assessments of certainty (or confidence) in the body of evidence for each outcome assessed. (Location: Discussion 4.1–4.4)
21a. Discuss any limitations of the evidence included in the review. (Location: Discussion 4.4, Appendix E)
21b. Discuss any limitations of the review processes used. (Location: Discussion 4.4, Appendix E)
21c. Discuss the implications of the results for practice, policy, and future research. (Location: Discussion 4.3, 4.4)
22a. Provide registration information for the review, including register name and registration number, or state that the review was not registered. (Location: Methods 2.1)
22b. Indicate where the review protocol can be accessed, or state that a protocol was not prepared. (Location: Methods 2.1)
22c. Describe and explain any amendments to information provided at registration or in the protocol. (Location: N/A)
23. Describe sources of financial or non-financial support for the review, and the role of the funders or sponsors in the review. (Location: None declared)
24. Declare any competing interests of review authors. (Location: None declared)
25. State which of the following are publicly available and where they can be found: template data collection forms; data extracted from included studies; data used for all analyses; analytic code; any other materials used in the review. (Location: Appendix C (extraction template); other materials available on request)