Comparison 2. Risk of bias.
Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
---|---|---|---|---|
2.1 Allocation Concealment | 4 | 499 | Std. Mean Difference (IV, Random, 95% CI) | 0.01 [‐0.16, 0.19] |
2.2 Intention to Treat Analysis | 6 | 898 | Std. Mean Difference (IV, Random, 95% CI) | 0.14 [‐0.03, 0.31] |