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Table 4 Comparison of the level of skills (average ratings: 1 = the best; 5 = the worst)

From: First aid as an important traffic safety factor – evaluation of the experience–based training

Type of training Life functions check – unconscious casualty treatment CPR – artificial breathing CPR – chest compression
Improved
 Mean 1.2 1.6 1.1
 Std. Deviation 0.41 0.74 0.26
 Median 1 1 1
Standard
 Mean 3.67 3.47 2.27
 Std. Deviation 0.72 1.2 0.96
 Median 4 3 2
Difference (n1 = n2 = 15)
 Mann-Whitney U 121.5*** 20.5*** 20.5***
 r 0.88 0.72 0.77
  1. ***p < .001