About this example
RoB 2 assesses five domains for each result of a randomised trial: the randomisation process, deviations from the intended interventions, missing outcome data, measurement of the outcome, and selection of the reported result. The traffic-light plot shows every judgement, so a reader can see at a glance that the two trials at high risk owe it to different domains.
The summary plot below is weighted by the trials’ meta-analysis weights, as robvis does by default, which shows how much of the pooled evidence is at each level of risk: most of the weight comes from trials at low risk or with some concerns, even though a third of the trials raise concerns in domain 5.
The data
| Study | D1 | D2 | D3 | D4 | D5 | Overall | Weight |
|---|---|---|---|---|---|---|---|
| Adams 2015 | Low | Low | Low | Low | Low | Low | 14.2 |
| Baker 2016 | Some concerns | Low | Low | Low | Some concerns | Some concerns | 9.8 |
| Chen 2017 | Low | Some concerns | High | Low | Low | High | 6.1 |
| Diaz 2018 | Low | Low | Low | Some concerns | Low | Some concerns | 12.5 |
| Evans 2018 | High | Some concerns | Low | Low | Some concerns | High | 4.3 |
| Fischer 2019 | Low | Low | Low | Low | Low | Low | 18.9 |
| Garcia 2020 | Low | Some concerns | Low | Low | Low | Some concerns | 11 |
| Huang 2021 | Some concerns | Low | Some concerns | Low | Low | Some concerns | 8.7 |
| Ibrahim 2022 | Low | Low | Low | Low | Some concerns | Some concerns | 14.5 |
Open the example, replace the data with your own, and export the figure as SVG, PDF, PNG or TIFF.