Effectiveness of chest compression and ventilation measured with AMBU CPR Software (n=582)
| Children’s age (years) | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| Participants (n) | 84 | 81 | 82 | 73 | 80 | 69 | 55 | 58 |
| Mean depth of chest compression (mm) | 22 (12–56) | 26 (12–56) | 36 (12–68) | 44 (30–59) | 41 (25–52) | 51 (29–71) | 55 (35–71) | 58 (38–75) |
| Correct depth of chest compression (%) | 7 | 11 | 15 | 42 | 39 | 68 | 68 | 74 |
| Mean frequency of chest compression/min | 122 (59–158) | 121 (59–158) | 121 (58–158) | 132 (96–155) | 127 (110–153) | 128 (97–163) | 139 (98–159) | 123 (99–151) |
| Correct frequency of chest compression (%) | 28 | 27 | 29 | 10 | 33 | 28 | 35 | 42 |
| Correct compression-relaxation rate (%) | 9 | 17 | 17 | 20 | 22 | 37 | 58 | 68 |
| Correct hand position of chest compression (%) | 62 | 65 | 69.3 | 90 | 78 | 79 | 71 | 86 |
| Compression pause (s) | 11 (0–12) | 9 (0–13) | 4 (0–30) | 10 (0–20) | 8 (0–26) | 9 (0–22) | 11 (7–21) | 8 (7–19) |
| Correct compression-ventilation rate (%) | 23 | 25 | 37 | 55 | 54 | 62 | 76 | 81 |
| Mean ventilation volume (L) | 0 | 0 | 0.05 (0-1) | 0.23 (0–0.8) | 0.02 (0–0.3) | 0.3 (0–1.2) | 0.3 (0–1) | 0.4 (0–1.5) |
| Correct ventilation volume (%) | 0 | 0 | 1.7 | 30 | 0 | 21 | 26 | 34 |
Range given in parentheses. Data are normally distributed.