Factors associated with return of spontaneous circulation after out-of-hospital cardiac arrest in Poland: a one-year retrospective study

Table 1 Comparison of selected variables characterizing the study group depending on ROCS

	ROSC				p-value*
	Yes (n = 192)	%	No (n = 800)	%	p-value*
Age (years)
x̅	65.5		67.7		=0.14
Min	4.0		1.0
Max	99.0		104.0
SD	17.9		17.7
Gender
Women	65	34	246	31	=0.41
Men	127	66	554	69	=0.41
Transfer to hospital during CPR
Yes	0	0	8	1	=0.44
No	192	100	792	99	=0.44
CPR initiated by witness
No	40	21	71	9	< 0.001
Yes	3	2	5	1
Not reported	149	78	724	91
ECG
VF/VT	60	31	116	15	< 0.001
ASYS/PEA	132	69	684	86	< 0.001
Public place
Yes	70	37	195	24	0.001
No	122	63	605	76	0.001
Type of EMT
B-EMT	79	41	375	47	=0.15
S-EMT	113	59	425	53	=0.15
Arrival time of EMT (minutes)
≤8	78	41	312	39	=0.68
> 8	114	59	488	61	=0.68
Arrival time of EMT (minutes)
x̅	16.9		15.7		=0.35
Min	1		0
Max	85		104
SD	15.8		15.8

*test χ²
Abbreviations: x̅ mean, Min minimum value, Max maximum value, SD standard deviation, n number of participants, % percent, ROSC return of spontaneous circulation, CPR cardiopulmonary resuscitation, ECG electrocardiography, EMT emergency medical team, B-EMT basic emergency medical team, S-EMT: EMT specialist emergency medical team, VF ventricular fibrillation, VT ventricular tachycardia, ASYS asystolia, PEA pulseless electrical activity

ISSN: 1471-2261