Table 2.
Characteristics of cases and controls
|
Characteristics |
A-CPR |
C-CPR |
P Value | |
|---|---|---|---|---|
| n = 66 | n = 220 | |||
| Age median [IQR](years) |
69 [53–78] |
71 [55–77.5] |
0.53* |
|
| Gender Male n(%) |
|
36 (55) |
135 (61) |
0.32# |
| Bystander CPR n(%) |
|
33 (54) |
127 (62) |
0.25# |
| Initial Rhythm |
|
|
|
|
| |
Asystole n(%) |
29 (44) |
88 (40) |
0.50^ |
| |
VF/VT n(%) |
20 (30) |
78 (36) |
|
| |
PEA n(%) |
8 (12) |
28 (13) |
|
| |
Other n(%) |
8 (12) |
26 (11) |
|
| |
unknown n(%) |
1 (2) |
0 |
|
| Witnessed status |
|
|
|
|
| |
Witnessed n(%) |
39 (59) |
133 (60) |
0.98# |
| |
Witnessed by EMS n(%) |
8 (12) |
26 (12) |
|
| |
Not witnessed n(%) |
19 (29) |
61 (28) |
|
| Precipitating Event |
|
|
|
|
| |
Presumed cardiac n(%) |
57 (86) |
211 (96) |
0.02^ |
| |
Respiratory n(%) |
5 (7) |
6 (3) |
|
| |
Neurological n(%) |
1 (2) |
0 |
|
| |
Overdose n(%) |
2 (3) |
3 (1) |
|
| |
Hanging n(%) |
1 (2) |
0 |
|
| EMS Response time median [IQR] |
9 [7-13] |
9 [7-13] |
0.73* |
|
| Time from arrival to A-CPR activation |
4 [2-7] |
NA |
|
|
| Overall survival to hospital n(%) |
17 (26) |
43 (20) |
0.23# |
|
| Overall survival to hospital discharge n(%) | 2 (3) | 15 (7) | 0.38^ | |
IQR: Inter-quartile range; NA: Not Applicable *Mann–Whitney test; #Chi Squared test; ^Fischer’s exact test.