Clinical trial | Randomization | Classification of the cause | Post-randomization | Contamination bias | Compliance bias study |
---|---|---|---|---|---|
of death | exclusions | control group | group | ||
Low risk of bias | Low risk of bias | Low risk of bias | No risk of bias | No risk of bias | |
High risk of bias | Low risk of bias | Low risk of bias | No risk of bias | No risk of bias | |
Low risk of bias | Unclear risk of bias | Low risk of bias | Low risk of bias | + | |
High risk of bias | Low risk of bias | Unclear risk of bias | No risk of bias | No risk of bias | |
High risk of bias | Unclear risk of bias | Unclear risk of bias | No risk of bias | No risk of bias | |
Low risk of bias | Low risk of bias | Low risk of bias | + | No risk of bias | |
Low risk of bias | Low risk of bias | Low risk of bias | + | No risk of bias | |
High risk of bias | High risk of bias | High risk of bias | No risk of bias | No risk of bias | |
High risk of bias | Low risk of bias | Unclear risk of bias | Low risk of bias | + | |
Edinburgh [34] | High risk of bias | Low risk of bias | High risk of bias | No risk of bias | + |