Results
ROSC
Twenty scenarios in the INT and twenty-one in the CON could be evaluated (Fig. Sample Size CHIPS-Study. CHIPS: Checklists in prehospital settingsParticipants (n = 172, 30 women, 122 men, 20 not specified) represented 23 of the 26 emergency service areas at study time. All emergency physicians were board-certified, while 9.8% (12/123) of the paramedics were still in training. About two thirds (61.0%) of the participants had over 10 years of professional experience. In both groups, just under half of the participants had experienced ROSC between one and three times within 1 year before study entry (INT: 43/92, 47.0%; CON 39/80, 49.0%). Approximately one quarter of the participants in both groups had experienced ROSC four to six times (INT: 20/92, 22.0%; CON: 19/80, 24.0%).In the post-scenario questionnaire both groups equally perceived the scenario as realistic on a 6-point Likert scale (INT: 4.97, CON: 5.06, A timeout at the beginning of the ROSC treatment (study period) was performed by 21 teams in the CON and 18 in the INT. On average, the timeout lasted 0.51 min in the CON and 1.40 min in the INT. The difference was not statistically significant (