Meta-Analysis
Copyright ©2014 Baishideng Publishing Group Inc.
World J Meta-Anal. Nov 26, 2014; 2(4): 171-178
Published online Nov 26, 2014. doi: 10.13105/wjma.v2.i4.171
Table 2 Risk ratios by study type
Study typeNumber of studiesRisk ratio(coil/clip)95%CI
RCT10.2860.008-1.011
Cohort study11.5120.956-2.068
All comparative studies141.1500.982-1.318
Observational studies650.7700.539-1.005