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Meta-Analysis
©The Author(s) 2024.
World J Meta-Anal. Mar 18, 2024; 12(1): 87026
Published online Mar 18, 2024. doi: 10.13105/wjma.v12.i1.87026
Table 1 Best evidence synthesis for qualitative outcome assessment
Level of evidence
Study design
Level 1Systematic Review or multiple RCTs
Level 2One RCT or multiple comparative studies
Level 3One comparative study or non-comparative research
Level 4Expert opinion


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