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Table 2 Objective resuscitation quality

From: Basic life support is effectively taught in groups of three, five and eight medical students: a prospective, randomized study

Variable

Assessment

All students

X3

X5

X8

Compression depth [mm] (mean ± SD)

Pre

48.2 ± 10.7

50.1 ± 10.0

40.5 ± 11.1

52.4 ± 7.7

Post

54.5 ± 5.3

55.6 ± 6.1

52.7 ± 4.7

54.8 ± 4.5

Compression depth (% within range)

Pre

31,9%

40,7%

15,8%

34,8%

Post

69,6%

55,6%

78,9%

78,3%

Compression rate [1/min] (mean ± SD)

Pre

102.8 ± 21.9

106.0 ± 22.6

98.6 ± 21.6

102.2 ± 21.7

Post

113.6 ± 11.1

112.9 ± 10.9

108.6 ± 8.0

118.5 ± 11.9

Compression rate (% within range)

Pre

29,0%

33,3%

21,1%

30,4%

Post

66,7%

70,4%

78,9%

52,2%

Duty Cycle [%] (mean ± SD)

Pre

46.5 ± 7.5

45.1 ± 8.0

49.5 ± 7.2

45.6 ± 6.6

Post

45.4 ± 5.0

45.0 ± 6.1

45.3 ± 4.6

46.0 ± 3.8

Compressions completely released [%] (median (IQR))

Pre

99 (73 – 100)

99 (67 – 100)

99 (47 – 100)

98 (86 – 100)

 

Post

96 (65 – 99)

97 (60 – 100)

95 (69 – 99)

97 (59 – 99)

  1. Objective resuscitation quality, reported as proposed by Kramer-Johansen et al.[20]. Values are shown for all students and for students in groups of three (X3), five (X5) or eight students per tutor (X8). For compression depth and rate, we furthermore report the % of students within the recommended range [1].