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

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

Variable	All control group	All intervention group	p	Female control group	Female intervention group	p	Male control group	Male intervention group	p
Variable	(N-32)	(N-34)	p	(N-26)	(N-22)	p	(N-6)	(N-12)	p
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)	0.401^a	23(85.2)	14(63.6)	0.157^a	4(57.1)	10(83.3)	0.211^a
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

ISSN: 1757-7241