Fig. 3

Effect plots illustrating the associations between the allocation to the equipment used (CPR.com device vs. standard equipment) and the cumulative number of prior CPR trainings of both team members within the last 5 years and the hands-off time (a), the time until the first defibrillation (b), the time until the second defibrillation (c), the time until the third defibrillation (d), the time interval until the administration of adrenaline (e) and the time interval until the administration of amiodarone (f). Coloured areas represent the estimator’s confidence bands. Although the plots illustrate the observed different effects of the equipment used and the number of prior CPR trainings of the rescuer teams, the interdependency between the equipment and the number of prior CPR trainings only reached statistical significance at the time of the third defibrillation in the ERC algorithm (d) (p = 0.014)