Meta-Analysis
Copyright ©The Author(s) 2024.
World J Clin Cases. Mar 6, 2024; 12(7): 1260-1271
Published online Mar 6, 2024. doi: 10.12998/wjcc.v12.i7.1260
Table 2 The level of qualitative evidence of subject studies
Level of evidence
Definition
n (%)
Level 1Systematic review; Meta analysis; Randomized controlled trials3 (12)
Level 2Non-randomized two group studies21 (88)