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Table 2 Analysis of the knowledge test in Study 2 (N = 611)

From: Development, validation and assessment of the test on knowledge about basic life support and use of automated external defibrillator among schoolchildren

QuestionSum correct - PreSum correct - PostΔPre-Postχ2prCorrect - Pre (%)IdiffIdiscr
6. How is basic life support correctly performed?318585267308,17< 0,0010,5052,40,520,67
10. What is an AED (automatic external defibrillator)?272521249239,63< 0,0010,45450,450,78
9. What do you do if you are unsure whether a person is in cardiac arrest or not?196398202146,05< 0,0010,3532,40,320,30
3. A person suddenly loses consciousness and collapses. What do you do?390559169129,47< 0,0010,3364,70,650,57
8. How do you perform artificial breaths in an unconscious person?397561164124, 60< 0,0010,3266,10,660,60
7. On the sketch of the torso below mark with a cross the correct site for chest compressions during basic life support;29242513355,64< 0,0010,2249,70,500,33
5. What kind of breathing is NOT a sign of life?39151412368,93< 0,0010,2464,50,650,63
2. Who can help in a case of cardiac arrest?4905758554,01< 0,0010,2180,50,800,49
4. How do you check if a person is breathing normally?5175664920,00< 0,0010,1384,90,850,39
1. How do you recognize a person in cardiac arrest?416451354,330,0370,0668,50,690,35
  1. Note: Questions are sorted by increasing difficulty. Df = 1. Pre – pre-test; Post – post-test; ΔPre-Post - differences between pre- and post-test; χ2 – chi square; r - effect size; Idiff - difficulty index; Idiscr – discriminating index