Fig. 3From: REBOARREST, resuscitative endovascular balloon occlusion of the aorta in non-traumatic out-of-hospital cardiac arrest: a study protocol for a randomised, parallel group, clinical multicentre triala Estimated sample size with return of spontaneous circulation as the primary endpoint. A horizontal line is drawn at the selected sample size of 100. ROSC, return of spontaneous circulation. b Estimated sample size with return of spontaneous circulation as the primary endpoint, compared to a control group with 25%, 20%, 15%, or 10% rate of ROSC. A horizontal line is drawn at the selected sample size of 100. ROSC, return of spontaneous circulationBack to article page