Research Article

CPR Compression Rotation Every One Minute Versus Two Minutes: A Randomized Cross-Over Manikin Study

Table 4

Comparison of adequate chest compression depth percentage between various subgroups.

VariableGroup valuea
1-minute2-minute

Gender
 Male (n = 53)36.4 (9.7, 82.8)11.9 (1.7, 60.4)<0.001
 Female (n = 51)1.7 (0, 26.3)0.6 (0, 10.0)0.010
Body mass index
 <25 kg/m2 (n = 83)12.2 (0, 58.4)4.5 (0, 24.0)<0.001
 ≥25 kg/m2 (n = 21)21.1 (3.2, 85.6)11.6 (0.5, 92.8)0.150
History of CPR in a real-life situation, n (%)
 Yes (n = 86)14.0 (0, 51.5)4.2 (0, 28.2)0.130
 No (n = 18)35.0 (2, 83.3)11.3 (1, 49.5)<0.001
Last CPR training session
 <6 months ago (n = 31)33.5 (7.1, 67.3)20.2 (2.8, 59.3)0.010
 ≥6 months ago (n = 73)9.7 (0, 46.9)2.7 (0, 16.0)<0.001
Regular physical activity, n (%)
 Yes (n = 24)49.7 (12.8, 81.0)9.9 (1.9, 53.5)0.020
 No (n = 80)8.7 (0, 39.7)4.1 (0, 23.8)<0.001

Data are presented as median (interquartile range); CPR, cardiopulmonary resuscitation. aBetween groups.