From: Smartphone apps to support laypersons in bystander CPR are of ambivalent benefit: a controlled trial using medical simulation
Control group (n,%)
Facultative group (n,%)
Mandatory group (n,%)
Correct body position
63 (85.1)
61 (95.4)
60 (100)
Correct arm posture
72 (97.3)
60 (93.7)
57 (95.0)