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.

Jennings et al.

Jennings et al. BMC Emergency Medicine 2012 12:8   doi:10.1186/1471-227X-12-8

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