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. 2020 Apr 22;10:6828. doi: 10.1038/s41598-020-63921-9

Table 1.

Rate of chest compressions.

Parameters Children manikin Infant manikin
15:2 ratio 30:2 ratio p 15:2 ratio 30:2 Ratio p
(n = 26) (n = 26) (n = 26) (n = 26)

Mean rate (min-1)

Mean (SD)

Minute 1 109.0 (9.2) 109.0 (11.8) 0.98 106.3 (10.7) 107.8 (11.4) 0.54
Minute 2 109.3 (11.1) 108.2 (12.3) 0.63 106.2 (10.4) 107.3 (11.9) 0.64
Minute 3 108.9 (10.4) 108.2 (11.8) 0.74 105.4 (12.1) 106.6 (13.0) 0.64
Overall 109.1 (11.5) 108.5 (12.7) 0.78 108.3 (13.7) 107.2 (12.4) 0.68

Percentage of chest compressions

Mean (SD)

Lower rate than optimal 14.3 (22.6) 20.3 (30.6) 0.35 18.5 (21.0) 23.8 (33.2) 0.39
Optimal rate 55.8 (35.1) 54.1 (39.1) 0.83 62.1 (31.5) 57.0 (31.1) 0.55
Higher rate than optimal 29.4 (34.5) 28.8 (40.1) 0.94 19.4 (31.5) 19.2 (25.8) 0.98

Number of chest compressions

Mean (SD)

Minute 1 54.4 (10.4) 67.5 (12.4) <0.01 56.1 (9.5) 67.3 (12.2) <0.01
Minute 2 64.0 (11.9) 81.0 (10.7) <0.01 66.1 (10.8) 80.9 (10.6) <0.01
Minute 3 63.1 (10.5) 80.6 (11.9) <0.01 65.3 (11.8) 80.9 (10.1) <0.01
Mean 60.5 (10.2) 76.4 (9.0) <0.01 62.5 (8.9) 76.4 (9.0) <0.01

Time without compressions (seconds in each CPR session)

Mean (SD)

74.0 (12.6) 45.3 (7.1) <0.01 68.4 (18.6) 42.9 (11.3) <0.01

Paired T-student test.