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 3 CC quality data of pairs

Variable	All control group pairs	All intervention group pairs	p	Female control group pairs	Female intervention group pairs	p	Male control group pairs	Male intervention group pairs	p
Variable	(N-15)	(N-21)	p	(N-12^a)	(N-11)	p	(N-3)	(N-10^a)	p
Chest compression fraction, %	85.6(7.2)	86(6.8)	0.882	84.6(7.5)	84.4(7.4)	0.956	89.5(5.3)	89.2(4.6)	0.930
Hands-off time, sec.	69.1(34.6)	67.2(32.6)	0.882	73.8(35.9)	74.8(35.5)	0.956	50.3(25.4)	52(22.2)	0.930
Average CC duty cycle, %	40.8(5.4)	44(3.3)	0.083	40.4(5.8)	44(3.6)	0.138	42.3(3.2)	44(3.4)	0.538

Data are presented as the mean (SD)
Data are presented as the median and interquartile range (IQR)
^aThere was 1 female pair from the control group and 2 male pairs from the intervention group with both members performing only every fourth CC whose results were not analyzed

ISSN: 1757-7241