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Table 2 CPR quality indicators between groups with different training levels

From: Relationship between level of CPR training, self-reported skills, and actual manikin test performance—an observational study

  Group I Group II Group III p value
(n = 128) (n = 82) (n = 28)  
Compression ratea First loop CPR 109 ± 29.1 107 ± 20.3 95 ± 27.9 0.036
Compression ratea Second loop CPR 104 ± 26.9 106 ± 16.0 98 ± 24.5 0.365
Compression ratea Third loop CPR 105 ± 26.0 106 ± 16.9 101 ± 18.3 0.603
Compression ratea Fourth loop CPR 106 ± 26.3 107 ± 18.3 100 ± 21.3 0.310
Compression ratea Fifth loop CPR 97 ± 26.8 113 ± 22.5 110 ± 27.3 p <  0.001
Effective ventilations (%)b 16.4 56.1 85.7 p <  0.001
Compression fractionc 0.65 ± 0.3 0.69 ± 0.3 0.74 ± 0.1 p <  0.001
Correct hand placement on chest (%)d 66.4 81.7 89.4 p = 0.019
Correct compression depth (%)e 40.6 71.4 82.1 p <  0.001
Total hands-off time (s) 47.0 ± 15.0 37.0 ± 12.8 30.3 ± 9.2 p <  0.001
Time from verified cardiac arrest to start CPR (s) 16.0 ± 12.8 3.0 ± 2.7 2.7 ± 1.2 p <  0.001
  1. All results are shown as mean ± SD or %, and p is calculated with one-way ANOVA for continuous data and chi-square test of independence for associations between categorical data
  2. CPR cardiopulmonary resuscitation
  3. aChest compressions per minute
  4. bElevation of thorax on manikin during rescue breaths
  5. cTime fraction used on compressions during five loops of 30:2
  6. dLower third of sternum in centre of thorax
  7. eCompression depth 5–6 cm