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Table 2 Comparison of chest compression quality and the subjective degree of difficulty among the three techniques

From: Optimal chest compression technique for paediatric cardiac arrest victims

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Chest compression methods

P -value for mixed model

Two-hand

Left one-hand

Right one-hand

Sequence

Period

Method

Compression rate (compressions/min)

116.8(111.7-121.9)

115.0(109.9-120.1)

115.5(110.4-120.6)

0.346

<0.001*

0.565

Compression depth (mm)

38.7(37.1-40.2)

36.3(34.8-37.9)

35.4(33.9-37.0)

0.414

0.054

<0.001*

Residual leaning rate (%)1

40.7(27.9-53.5)

29.2(16.4-42.0)

25.8(13.0-38.6)

0.645

0.056

0.021*

Number of slipped compressions

0.6(-0.2-1.3)

1.5(0.8-2.2)

0.7(-0.1-1.4)

0.102

0.194

0.097

Subjective difficulty (mm) 2

60.8(55.7-66.0)

72.4(67.3,77.5)

70.0(64.8-75.1)

0.147

0.789

<0.001*

  1. All values are estimated means (95% confidence interval) except p values.
  2. 1the ratio of the number of compressions with residual leaning to the total number of compressions; residual leaning is defined as ≥2.5 kg residual force on the chest at the end of the release phase of each compression.
  3. 2rated as visual analogue scale (0 mm, extremely easy to 100 mm, extremely difficult).
  4. *p < 0.05 is considered to be statistically significant.