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Table 1 Comparison of the control and intervention groups at the beginning of the study

From: Are two or four hands needed for elderly female bystanders to achieve the required chest compression depth during dispatcher-assisted CPR: a randomized controlled trial

Variable

All control group

All intervention group

p

Female control group

Female intervention group

p

Male control group

Male intervention group

p

(N-32)

(N-34)

(N-26)

(N-22)

(N-6)

(N-12)

Mean age, years

59.6(6.9)

60.6(6.9)

0.565

60.4(7)

61.7(0.2)

0.511

56.6(6.3)

58.6(7.7)

0.565

Weight, kg

79.0(16.5)

81.1(15.2)

0.562

78(17.7)

75.09(12.07)

0.519

84.8(5.1)

92.1(14.4)

0.299

Height, m

1.68(0.07)

1.69(0.1)

0.603

1.66(5.5)

1.64(5.96)

0.141

1.77(0.07)

1.79(0.08)

0.649

BMI

28.0(5.9)

28.3(4.4)

0.832

28.2(6.43)

28.0(4.67)

0.914

27.1(2.1)

28.7(4.1)

0.384

Clinical frailty score

         

No 1–2 (%)

27(79.4)

24(70.6)

0.401a

23(85.2)

14(63.6)

0.157a

4(57.1)

10(83.3)

0.211a

No 3 (%)

7(20.6)

10(29.4)

 

4(14.8)

8(36.4)

 

3(42.9)

2(16.7)

 

Heart rate, min−1

77.5(10.6)

79.6(11.7)

0.443

76.4(10.54)

80.2(12.10)

0.245

81.9(10.6)

78.5(11.2)

0.531

MAP, mm Hg

96.2(13.1)

91.8(11.5)

0.144

93.1(10.96)

88.4(11.00)

0.146

108.0(14.8)

97.8(10.1)

0.092

Saturation, %

97.2(1.8)

96.7(1.8)

0.636

97.3(1.88)

97.3(1.80)

0.965

96.7(1.5)

96.4(1.6)

0.697

  1. Data are presented as the mean (SD)
  2. aChi square = 2.00, df =1