Statistical analysis
Data were analyzed with IBM SPSS Statistics Version 25 (IBM Corp., Armonk, NY, USA). A two-way mixed model analysis of variance (ANOVA) with time as the within subject factor and study group as the between subject factor were conducted to examine the effect of the intervention on BLS performance, time to start first compression, and students’ self-reported confidence, respectively. Significance was determined by two-sided 95% confidence intervals.Raw data of the study underlying all analyses reported in this paper can be found under 