| Study | Reason for exclusion |
|---|---|
| ChiCTR‐TRC‐12002844 | ChiCTR‐TRC‐12002844a was excluded as it is evaluating the same intervention in both treatment groups |
| NCT00922454 | NCT00922454 was excluded as it compared interventions for the management of abdominal aortic aneurysms |
| NCT01354119 | NCT01354119 compared surgical intervention with a conservative control group |