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Table 1 Analysis of the knowledge test in Study 1 (N = 172)

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?53172119170,86< 0,0010,7130,30,320,43
10. What is an AED (automatic external defibrillator)?701528285,56< 0,0010,51400,430,72
9. What do you do if you are unsure whether a person is in cardiac arrest or not?711285736,74< 0,0010,3340,60,430,32
8. How do you perform artificial breaths in an unconscious person?1101544433,50< 0,0010,3162,90,650,55
3. A person suddenly loses consciousness and collapses. What do you do?1011454426,63< 0,0010,2857,70,580,66
7. On the sketch of the torso below mark with a cross the correct site for chest compressions during basic life support;721154321,16< 0,0010,2541,10,430,43
2. Who can help in a case of cardiac arrest?1431682520,79< 0,0010,2481,70,820,31
4. How do you check if a person is breathing normally?145164199,410,0020,1782,90,840,31
1. How do you recognize a person in cardiac arrest?113132194,060,0440,1164,60,670,34
5. What kind of breathing is NOT a sign of life?17217312,000,1570,0898,30,990,02
  1. Note: 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