Table 2 Results of intragroup comparisons

Check safety

 < 0.001 (0.20)

 < 0.001 (0.22)

0.648 (0.16)

 < 0.001 (0.22)

 < 0.001 (0.20)

 < 0.001 (0.22)

 < 0.001 (0.18)

 < 0.001 (0.24)

0.546 (0.14)

Check consciousness

-^*

-^*

0.122 (0.16)

-^*

-

 < 0.001 (0.20)

-^*

-^*

 < 0.001 (0.22)

Check breathing (10 s)

-^*

-^*

0.016 (0.20)

 < 0.001 (0.24)

0.625 (0.14)

 < 0.001 (0.20)

-^*

-^*

 < 0.001 (0.20)

Check breathing (positioning the head)

-^*

-^*

 < 0.001 (0.22)

-^*

-

 < 0.001 (0.22)

-^*

-^*

 < 0.001 (0.20)

Check breathing (look-listen-feel)

 < 0.001 (0.24)

0.110 (0.18)

0.834 (0.14)

 < 0.001 (0.24)

 < 0.001 (0.20)

 < 0.001 (0.20)

 < 0.001 (0.22)

0.072 (0.18)

0.012 (0.20)

Call the ambulance (112)

 < 0.001 (0.20)

 < 0.001 (0.17)

0.454 (0.14)

 < 0.001 (0.20)

 < 0.001 (0.23)

0.824 (0.14)

 < 0.001 (0.22)

 < 0.001 (0.19)

1 (0.16)

Chest compression (30)

-^*

-^*

0.238 (0.14)

 < 0.001 (0.20)

 < 0.001 (0.20)

0.143 (0.18)

 < 0.001 (0.22)

 < 0.001 (0.22)

 < 0.001 (0.20)

Chest compression (hand position)

-^*

-^*

0.453 (0.20)

 < 0.001 (0.16)

 < 0.001 (0.18)

1 (0.20)

 < 0.001 (0.24)

 < 0.001 (0.22)

1 (0.12)

Ventilation (positioning the head)

-^*

-^*

0.011 (0.18)

 < 0.001 (0.20)

0.765 (0.17)

 < 0.001 (0.20)

-^*

-^*

 < 0.001 (0.23)

Ventilation (2 times)

-^*

-^*

0.243

-^*

-^*

 < 0.001 (0.23)

-^*

-^*

 < 0.001 (0.21)

Total BLS score (every step were correct)

-^*

-^*

0.213 (0.15)

-^*

-^*

-^*

-^*

-^*

0.435 (0.19)

Total BLS score (≥ 60% were correct)

-^*

-^*

0.011 (0.21)

-^*

-^*

 < 0.001 (0.24)

-^*

-^*

0.001 (0.23)

Attitude

 A person is lying on the ground with a health emergency and needing help. Could you help him/her?

0.139 (0.15)

0.690 (0.13)

0.424 (0.20)

0.839 (0.18)

0.210 (0.21)

0.405 (0.15)

0.791 (0.18)

0.424 (0.16)

0.774 (0.20)