(a) By interchanging random-effect and fixed-effect models
| Standardized Mean Difference (95%CI) | P-value | I 2 -value, % | |
|
| |||
| Random-effect | -1.13 [-1.48, -0.78] | P<0.00001 | 73% |
| Fixed-effect | -1.02 [-1.20, -0.84] | P<0.00001 | 73% |
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