(a) By interchanging random-effect and fixed-effect models
| Risk Ratio (95%CI) | P-value | I 2 -value, % | |
|
| |||
| Random-effect | 1.24 [1.13, 1.36] | P<0.00001 | 37% |
| Fixed-effect | 1.27 [1.18, 1.37] | P<0.00001 | 37% |
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