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Table 1 Mean and range of compressions and ventilations divided into pre- and post-test

From: To enhance the quality of CPR performed by youth layman

Item Pre-test Under perform Over perform Post-test Under perform Over perform Sig. (2-tailed)
Compression depth (cm) 4.88 46% 4% 5.11 39% 6% .064
Standard deviation .68    .54    
Range 3–6    4–6    
Compression rate (per min) 117 15% 54% 128 6% 75% .001
Standard deviation 17.1    14.8    
Range 70–159    92–166    
Compression recoil (%) 89 11% 0% 92 7% 0% .404
Standard deviation 24.3    17.4    
Range 3–100    19–100    
Hand position (%) 84 16% 0% 93 7% 0% .024
Standard deviation 23.9    13.9    
Range 8–100    29–100    
Ventilation volume (ml) 112 88% 12% 579 49% 47% .000
Standard deviation 309.3    588.7    
Range 0–1100    0–1400