| Reference . | year . | Risk of bias assessment . | ||||||
|---|---|---|---|---|---|---|---|---|
| Random sequence generation . | Allocation concealment . | Blinding of participants and personnel . | Blinding of outcome assessment . | Incomplete outcome data . | Selective reporting . | Other bias . | ||
| Antoniewicz et al. | 2019 | Low | Low | Low | Low | Low | Low | Unclear |
| Franzen et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
| Chaumont et al. | 2018 | Low | Low | Low | Low | Low | Low | Unclear |
| Haptonstall et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Biondi-Zoccai et al. | 2019 | Low | Low | Low | Low | Low | Low | Low |
| Cossio et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Carnevale et al. | 2016 | Low | Low | Low | Low | Low | Low | Low |
| Ikonomidis et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
| Reference . | year . | Risk of bias assessment . | ||||||
|---|---|---|---|---|---|---|---|---|
| Random sequence generation . | Allocation concealment . | Blinding of participants and personnel . | Blinding of outcome assessment . | Incomplete outcome data . | Selective reporting . | Other bias . | ||
| Antoniewicz et al. | 2019 | Low | Low | Low | Low | Low | Low | Unclear |
| Franzen et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
| Chaumont et al. | 2018 | Low | Low | Low | Low | Low | Low | Unclear |
| Haptonstall et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Biondi-Zoccai et al. | 2019 | Low | Low | Low | Low | Low | Low | Low |
| Cossio et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Carnevale et al. | 2016 | Low | Low | Low | Low | Low | Low | Low |
| Ikonomidis et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
High, high risk of bias; Low, low risk of bias; Unclear, unclear risk of bias.
| Reference . | year . | Risk of bias assessment . | ||||||
|---|---|---|---|---|---|---|---|---|
| Random sequence generation . | Allocation concealment . | Blinding of participants and personnel . | Blinding of outcome assessment . | Incomplete outcome data . | Selective reporting . | Other bias . | ||
| Antoniewicz et al. | 2019 | Low | Low | Low | Low | Low | Low | Unclear |
| Franzen et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
| Chaumont et al. | 2018 | Low | Low | Low | Low | Low | Low | Unclear |
| Haptonstall et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Biondi-Zoccai et al. | 2019 | Low | Low | Low | Low | Low | Low | Low |
| Cossio et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Carnevale et al. | 2016 | Low | Low | Low | Low | Low | Low | Low |
| Ikonomidis et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
| Reference . | year . | Risk of bias assessment . | ||||||
|---|---|---|---|---|---|---|---|---|
| Random sequence generation . | Allocation concealment . | Blinding of participants and personnel . | Blinding of outcome assessment . | Incomplete outcome data . | Selective reporting . | Other bias . | ||
| Antoniewicz et al. | 2019 | Low | Low | Low | Low | Low | Low | Unclear |
| Franzen et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
| Chaumont et al. | 2018 | Low | Low | Low | Low | Low | Low | Unclear |
| Haptonstall et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Biondi-Zoccai et al. | 2019 | Low | Low | Low | Low | Low | Low | Low |
| Cossio et al. | 2020 | Low | Low | Low | Low | Low | Low | Unclear |
| Carnevale et al. | 2016 | Low | Low | Low | Low | Low | Low | Low |
| Ikonomidis et al. | 2018 | Low | Low | Low | Low | Low | Low | Low |
High, high risk of bias; Low, low risk of bias; Unclear, unclear risk of bias.
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