Chest compression data of the app and the DVD groups
| App directly after training (N=524) | DVD directly after training (N=537) | p Value | App at retest (N=549) | DVD at retest (N=575) | p Value | |
|---|---|---|---|---|---|---|
| CC depth (mm) | 40 (11) | 40 (11) | NS | 44 (10)* | 46 (10)* | 0.002 |
| CC rate (n/min) | 111 (27) | 112 (20) | NS | 100 (27)* | 104 (22)* | 0012 |
| CC rate 100–120/min | 149 (28) | 232 (43) | <0.001 | 166 (30) | 217 (38) | 0.008 |
| CC with complete release | 387 (74) | 446 (83) | <0.001 | 416 (76) | 476 (83) | 0.004 |
| Total hands-off time (s) | 73 (21) | 81 (19) | <0.001 | 68 (24)* | 69 (22)* | NS |
Values are presented as mean (SD) or n (%). Differences in proportions were analysed by Pearson χ2 test. Differences between intervention groups were analysed by unpaired t test. Differences between baseline and retest were analysed by paired t test, where * indicates p<0.001.
CC, chest compression; NS, not significant.