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Table 2 Comparison of the CC quality data and vital signs after 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)
Total CC number 394(56) 444(112) 0.831 390(59) 419(119) 0.001 407(44) 505(58) 0.002
CC with adequate depth, No 188(169) 334(173) 0.012 136(147) 267(157) 0.004 350(129) 501(6) 0.010
CC with adequate depth, % 46.9(41.3) 74.8(31.8) 0.003 34.9(36.8) 65.1(33.0) 0.021 84.9(31.0) 99.0(1.0) 0.218
Mean compression depth, mm 47.8(9.6) 54.2(7.1) 0.002 44.9(8.8) 51.5(7.4) 0.008 57.8(3.2) 59.3(1.2) 0.158
Mean CC rate, min−1 97.3(17.2) 91.0(35.6) 0.352 95.9(28.5) 93.9(28.5) 0.770 102.7(6.6) 116.8(9.2) 0.005
Leaning, % 1.1(3.6) 0.8(1.9) 0.639 1.3(4.1) 0.5(1.2) 0.372 0.4(0.4) 1.3(2.7) 0.377
Heart rate, min−1 80.7(12.8) 83.6(16.1) 0.427 99.1(12.3) 93.3(13.2) 0.255 87.1(13.7) 84.1(21.2) 0.738
MAP, mmHg 97.3(13.0) 93.2(12.6) 0.192 93.5(9.8) 90.9(12.8) 0.419 112.0(14.0) 97.6(11.4) 0.025
Saturation, % 97.3(1.1) 97.1(1.7) 0.866 97.0(1.1) 97.0(1.8) 0.930 97.0(0.8) 97.3(1.7) 0.716
  1. Data are presented as the mean (SD)