Quality of CPR
chest compression
The mean chest compression frequency did not differ significantly between both groups. Plata et al. also showed non-guideline compliant chest compression frequencies in a randomised controlled simulated T-CPR manikin trial with 78 bpm [The average compression depth over the entire time was lower in the original wording group compared to the intervention group. The compression depth was not part of the study's hypothesis, so this significance may have been due to cumulative alpha error and missing Bonferroni correction.Nearly all participants in both groups had a correct hand position. The wording of the T-CPR protocol "in the middle of the chest" is thus practicable and confirms the results of Lee et al. [